/* ASTER DESIGN SYSTEM - V2 */

/* --- tokens.css --- */
/* ========================================
   ASTER DESIGN SYSTEM - TOKENS
   ======================================== */

:root {
    /* OKLCH Monochrome Palette - Light Theme */
    --color-bg-primary: oklch(98% 0 0);
    --color-bg-secondary: oklch(96% 0 0);
    --color-bg-tertiary: oklch(94% 0 0);
    --color-bg-elevated: oklch(100% 0 0);
    --color-bg-overlay: oklch(0% 0 0 / 0.4);
    
    --color-text-primary: oklch(20% 0 0);
    --color-text-secondary: oklch(45% 0 0);
    --color-text-tertiary: oklch(60% 0 0);
    --color-text-inverse: oklch(98% 0 0);
    --color-text-muted: oklch(70% 0 0);
    
    --color-border-primary: oklch(88% 0 0);
    --color-border-secondary: oklch(92% 0 0);
    
    --color-surface-hover: oklch(93% 0 0);
    --color-surface-active: oklch(90% 0 0);
    
    --color-accent: oklch(20% 0 0);
    --color-success: oklch(40% 0 0);
    --color-warning: oklch(50% 0 0);
    --color-error: oklch(30% 0 0);
    
    /* Spacing Scale - 4px base */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;
    --space-20: 80px;
    --space-24: 96px;
    
    /* Typography Scale */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --font-size-3xl: 32px;
    
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    --line-height-tight: 1.25;
    --line-height-base: 1.5;
    --line-height-relaxed: 1.625;
    
    /* Layout Constants */
    --navbar-height: 56px;
    --sidebar-width: 240px;
    --chat-width: 380px;
    --fab-size: 56px;
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 16px;
    --border-radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px oklch(0% 0 0 / 0.05);
    --shadow-md: 0 4px 6px oklch(0% 0 0 / 0.07), 0 2px 4px oklch(0% 0 0 / 0.05);
    --shadow-lg: 0 10px 15px oklch(0% 0 0 / 0.1), 0 4px 6px oklch(0% 0 0 / 0.05);
    --shadow-xl: 0 20px 25px oklch(0% 0 0 / 0.15), 0 10px 10px oklch(0% 0 0 / 0.04);
    
    /* Safe Area Insets */
    --safe-area-inset-top: env(safe-area-inset-top);
    --safe-area-inset-right: env(safe-area-inset-right);
    --safe-area-inset-bottom: env(safe-area-inset-bottom);
    --safe-area-inset-left: env(safe-area-inset-left);
}

/* Dark Theme */
@media (prefers-color-scheme: dark) {
    :root {
        --color-bg-primary: oklch(15% 0 0);
        --color-bg-secondary: oklch(18% 0 0);
        --color-bg-tertiary: oklch(21% 0 0);
        --color-bg-elevated: oklch(20% 0 0);
        --color-bg-overlay: oklch(0% 0 0 / 0.7);
        
        --color-text-primary: oklch(95% 0 0);
        --color-text-secondary: oklch(70% 0 0);
        --color-text-tertiary: oklch(55% 0 0);
        --color-text-inverse: oklch(15% 0 0);
        --color-text-muted: oklch(45% 0 0);
        
        --color-border-primary: oklch(28% 0 0);
        --color-border-secondary: oklch(24% 0 0);
        
        --color-surface-hover: oklch(23% 0 0);
        --color-surface-active: oklch(26% 0 0);
        
        --shadow-sm: 0 1px 2px oklch(0% 0 0 / 0.3);
        --shadow-md: 0 4px 6px oklch(0% 0 0 / 0.3), 0 2px 4px oklch(0% 0 0 / 0.2);
        --shadow-lg: 0 10px 15px oklch(0% 0 0 / 0.4), 0 4px 6px oklch(0% 0 0 / 0.3);
        --shadow-xl: 0 20px 25px oklch(0% 0 0 / 0.5), 0 10px 10px oklch(0% 0 0 / 0.3);
    }
}


/* --- theming.css --- */
/* ========================================
   ASTER DESIGN SYSTEM - THEMING
   ======================================== */

/* 
  Manual Theme Overrides 
  These attributes allow developers to force a specific theme, 
  overriding the system preferences defined in tokens.css.
*/

/* ----------------------------------------
   LIGHT THEME (Override)
   ---------------------------------------- */
[data-theme="light"] {
    --color-bg-primary: oklch(98% 0 0);
    --color-bg-secondary: oklch(96% 0 0);
    --color-bg-tertiary: oklch(94% 0 0);
    --color-bg-elevated: oklch(100% 0 0);
    --color-bg-overlay: oklch(0% 0 0 / 0.4);
    
    --color-text-primary: oklch(20% 0 0);
    --color-text-secondary: oklch(45% 0 0);
    --color-text-tertiary: oklch(60% 0 0);
    --color-text-inverse: oklch(98% 0 0);
    --color-text-muted: oklch(70% 0 0);
    
    --color-border-primary: oklch(88% 0 0);
    --color-border-secondary: oklch(92% 0 0);
    
    --color-surface-hover: oklch(93% 0 0);
    --color-surface-active: oklch(90% 0 0);
    
    --shadow-sm: 0 1px 2px oklch(0% 0 0 / 0.05);
    --shadow-md: 0 4px 6px oklch(0% 0 0 / 0.07), 0 2px 4px oklch(0% 0 0 / 0.05);
    --shadow-lg: 0 10px 15px oklch(0% 0 0 / 0.1), 0 4px 6px oklch(0% 0 0 / 0.05);
    --shadow-xl: 0 20px 25px oklch(0% 0 0 / 0.15), 0 10px 10px oklch(0% 0 0 / 0.04);
}

/* ----------------------------------------
   DARK THEME (Override)
   ---------------------------------------- */
[data-theme="dark"] {
    --color-bg-primary: oklch(15% 0 0);
    --color-bg-secondary: oklch(18% 0 0);
    --color-bg-tertiary: oklch(21% 0 0);
    --color-bg-elevated: oklch(20% 0 0);
    --color-bg-overlay: oklch(0% 0 0 / 0.7);
    
    --color-text-primary: oklch(95% 0 0);
    --color-text-secondary: oklch(70% 0 0);
    --color-text-tertiary: oklch(55% 0 0);
    --color-text-inverse: oklch(15% 0 0);
    --color-text-muted: oklch(45% 0 0);
    
    --color-border-primary: oklch(28% 0 0);
    --color-border-secondary: oklch(24% 0 0);
    
    --color-surface-hover: oklch(23% 0 0);
    --color-surface-active: oklch(26% 0 0);
    
    --shadow-sm: 0 1px 2px oklch(0% 0 0 / 0.3);
    --shadow-md: 0 4px 6px oklch(0% 0 0 / 0.3), 0 2px 4px oklch(0% 0 0 / 0.2);
    --shadow-lg: 0 10px 15px oklch(0% 0 0 / 0.4), 0 4px 6px oklch(0% 0 0 / 0.3);
    --shadow-xl: 0 20px 25px oklch(0% 0 0 / 0.5), 0 10px 10px oklch(0% 0 0 / 0.3);
}

/* ----------------------------------------
   HIGH CONTRAST THEME (System & Override)
   ---------------------------------------- */
@media (prefers-contrast: more) {
    :root:not([data-theme="light"]):not([data-theme="dark"]) {
        /* Maximum contrast OKLCH values for accessibility */
        --color-bg-primary: oklch(100% 0 0); /* Pure White */
        --color-bg-secondary: oklch(100% 0 0);
        --color-bg-tertiary: oklch(100% 0 0);
        --color-bg-elevated: oklch(100% 0 0);
        
        --color-text-primary: oklch(0% 0 0); /* Pure Black */
        --color-text-secondary: oklch(10% 0 0);
        --color-text-tertiary: oklch(20% 0 0);
        --color-text-inverse: oklch(100% 0 0);
        
        --color-border-primary: oklch(0% 0 0); /* Pure Black borders */
        --color-border-secondary: oklch(15% 0 0);
    }
}

@media (prefers-color-scheme: dark) and (prefers-contrast: more) {
    :root:not([data-theme="light"]):not([data-theme="dark"]) {
        --color-bg-primary: oklch(0% 0 0); /* Pure Black */
        --color-bg-secondary: oklch(0% 0 0);
        --color-bg-tertiary: oklch(0% 0 0);
        --color-bg-elevated: oklch(0% 0 0);
        
        --color-text-primary: oklch(100% 0 0); /* Pure White */
        --color-text-secondary: oklch(90% 0 0);
        --color-text-tertiary: oklch(80% 0 0);
        --color-text-inverse: oklch(0% 0 0);
        
        --color-border-primary: oklch(100% 0 0); /* Pure White borders */
        --color-border-secondary: oklch(85% 0 0);
    }
}

/* Explicit High Contrast Light Override */
[data-theme="high-contrast-light"] {
    --color-bg-primary: oklch(100% 0 0);
    --color-bg-secondary: oklch(100% 0 0);
    --color-bg-tertiary: oklch(100% 0 0);
    --color-bg-elevated: oklch(100% 0 0);
    
    --color-text-primary: oklch(0% 0 0);
    --color-text-secondary: oklch(10% 0 0);
    --color-text-tertiary: oklch(20% 0 0);
    --color-text-inverse: oklch(100% 0 0);
    
    --color-border-primary: oklch(0% 0 0);
    --color-border-secondary: oklch(15% 0 0);
}

/* Explicit High Contrast Dark Override */
[data-theme="high-contrast-dark"] {
    --color-bg-primary: oklch(0% 0 0);
    --color-bg-secondary: oklch(0% 0 0);
    --color-bg-tertiary: oklch(0% 0 0);
    --color-bg-elevated: oklch(0% 0 0);
    
    --color-text-primary: oklch(100% 0 0);
    --color-text-secondary: oklch(90% 0 0);
    --color-text-tertiary: oklch(80% 0 0);
    --color-text-inverse: oklch(0% 0 0);
    
    --color-border-primary: oklch(100% 0 0);
    --color-border-secondary: oklch(85% 0 0);
}


/* --- layout.css --- */
/* ========================================
   LAYOUT SYSTEM - ASTER MONOCHROME
   Strict 24-Column Grid, 4px Scale, Safari Full-Bleed
   ======================================== */

:root {
  /* Layout Constants (derived from 02-tokens) */
  --grid-columns: 24;
  --grid-gap: var(--space-4, 16px);
  --container-max-width: 1200px;
  
  /* Safe Area Insets mapped from tokens */
  --safe-area-inset-top: env(safe-area-inset-top, 0px);
  --safe-area-inset-right: env(safe-area-inset-right, 0px);
  --safe-area-inset-bottom: env(safe-area-inset-bottom, 0px);
  --safe-area-inset-left: env(safe-area-inset-left, 0px);
}

/* ========================================
   CONTAINERS (Transparent Edge)
   Safari Full-Bleed: Surface layers separate
   ======================================== */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  /* Safe-area on inner wrappers only */
  padding-left: max(var(--space-4, 16px), var(--safe-area-inset-left));
  padding-right: max(var(--space-4, 16px), var(--safe-area-inset-right));
}

.container-fluid {
  width: 100%;
  /* Safe-area on inner wrappers only */
  padding-left: max(var(--space-4, 16px), var(--safe-area-inset-left));
  padding-right: max(var(--space-4, 16px), var(--safe-area-inset-right));
}

/* ========================================
   24-COLUMN GRID SYSTEM
   ======================================== */
.grid {
  display: grid;
  grid-template-columns: repeat(var(--grid-columns), minmax(0, 1fr));
  gap: var(--grid-gap);
}

/* Column Spans (1 to 24) */
.col-1 { grid-column: span 1 / span 1; }
.col-2 { grid-column: span 2 / span 2; }
.col-3 { grid-column: span 3 / span 3; }
.col-4 { grid-column: span 4 / span 4; }
.col-5 { grid-column: span 5 / span 5; }
.col-6 { grid-column: span 6 / span 6; }
.col-7 { grid-column: span 7 / span 7; }
.col-8 { grid-column: span 8 / span 8; }
.col-9 { grid-column: span 9 / span 9; }
.col-10 { grid-column: span 10 / span 10; }
.col-11 { grid-column: span 11 / span 11; }
.col-12 { grid-column: span 12 / span 12; }
.col-13 { grid-column: span 13 / span 13; }
.col-14 { grid-column: span 14 / span 14; }
.col-15 { grid-column: span 15 / span 15; }
.col-16 { grid-column: span 16 / span 16; }
.col-17 { grid-column: span 17 / span 17; }
.col-18 { grid-column: span 18 / span 18; }
.col-19 { grid-column: span 19 / span 19; }
.col-20 { grid-column: span 20 / span 20; }
.col-21 { grid-column: span 21 / span 21; }
.col-22 { grid-column: span 22 / span 22; }
.col-23 { grid-column: span 23 / span 23; }
.col-24 { grid-column: span 24 / span 24; }

/* Grid Starts */
.col-start-1 { grid-column-start: 1; }
.col-start-2 { grid-column-start: 2; }
.col-start-3 { grid-column-start: 3; }
.col-start-4 { grid-column-start: 4; }
.col-start-5 { grid-column-start: 5; }
.col-start-6 { grid-column-start: 6; }
.col-start-7 { grid-column-start: 7; }
.col-start-8 { grid-column-start: 8; }
.col-start-9 { grid-column-start: 9; }
.col-start-10 { grid-column-start: 10; }
.col-start-11 { grid-column-start: 11; }
.col-start-12 { grid-column-start: 12; }
.col-start-13 { grid-column-start: 13; }
.col-start-14 { grid-column-start: 14; }
.col-start-15 { grid-column-start: 15; }
.col-start-16 { grid-column-start: 16; }
.col-start-17 { grid-column-start: 17; }
.col-start-18 { grid-column-start: 18; }
.col-start-19 { grid-column-start: 19; }
.col-start-20 { grid-column-start: 20; }
.col-start-21 { grid-column-start: 21; }
.col-start-22 { grid-column-start: 22; }
.col-start-23 { grid-column-start: 23; }
.col-start-24 { grid-column-start: 24; }

/* Responsive Adjustments (Mobile 12-col override mapping to 24) */
@media (max-width: 768px) {
  .grid {
    gap: var(--space-3, 12px);
  }
  .col-sm-1 { grid-column: span 1 / span 1; }
  .col-sm-2 { grid-column: span 2 / span 2; }
  .col-sm-3 { grid-column: span 3 / span 3; }
  .col-sm-4 { grid-column: span 4 / span 4; }
  .col-sm-5 { grid-column: span 5 / span 5; }
  .col-sm-6 { grid-column: span 6 / span 6; }
  .col-sm-7 { grid-column: span 7 / span 7; }
  .col-sm-8 { grid-column: span 8 / span 8; }
  .col-sm-9 { grid-column: span 9 / span 9; }
  .col-sm-10 { grid-column: span 10 / span 10; }
  .col-sm-11 { grid-column: span 11 / span 11; }
  .col-sm-12 { grid-column: span 12 / span 12; }
  .col-sm-13 { grid-column: span 13 / span 13; }
  .col-sm-14 { grid-column: span 14 / span 14; }
  .col-sm-15 { grid-column: span 15 / span 15; }
  .col-sm-16 { grid-column: span 16 / span 16; }
  .col-sm-17 { grid-column: span 17 / span 17; }
  .col-sm-18 { grid-column: span 18 / span 18; }
  .col-sm-19 { grid-column: span 19 / span 19; }
  .col-sm-20 { grid-column: span 20 / span 20; }
  .col-sm-21 { grid-column: span 21 / span 21; }
  .col-sm-22 { grid-column: span 22 / span 22; }
  .col-sm-23 { grid-column: span 23 / span 23; }
  .col-sm-24 { grid-column: span 24 / span 24; }
  .col-start-sm-1 { grid-column-start: 1; }
  .col-start-sm-2 { grid-column-start: 2; }
  .col-start-sm-3 { grid-column-start: 3; }
  .col-start-sm-4 { grid-column-start: 4; }
  .col-start-sm-5 { grid-column-start: 5; }
  .col-start-sm-6 { grid-column-start: 6; }
  .col-start-sm-7 { grid-column-start: 7; }
  .col-start-sm-8 { grid-column-start: 8; }
  .col-start-sm-9 { grid-column-start: 9; }
  .col-start-sm-10 { grid-column-start: 10; }
  .col-start-sm-11 { grid-column-start: 11; }
  .col-start-sm-12 { grid-column-start: 12; }
  .col-start-sm-13 { grid-column-start: 13; }
  .col-start-sm-14 { grid-column-start: 14; }
  .col-start-sm-15 { grid-column-start: 15; }
  .col-start-sm-16 { grid-column-start: 16; }
  .col-start-sm-17 { grid-column-start: 17; }
  .col-start-sm-18 { grid-column-start: 18; }
  .col-start-sm-19 { grid-column-start: 19; }
  .col-start-sm-20 { grid-column-start: 20; }
  .col-start-sm-21 { grid-column-start: 21; }
  .col-start-sm-22 { grid-column-start: 22; }
  .col-start-sm-23 { grid-column-start: 23; }
  .col-start-sm-24 { grid-column-start: 24; }
}

/* ========================================
   SAFE AREA CLEARANCE UTILITIES
   ======================================== */
.safe-pt { padding-top: max(var(--space-4, 16px), var(--safe-area-inset-top)); }
.safe-pb { padding-bottom: max(var(--space-4, 16px), var(--safe-area-inset-bottom)); }
.safe-pl { padding-left: max(var(--space-4, 16px), var(--safe-area-inset-left)); }
.safe-pr { padding-right: max(var(--space-4, 16px), var(--safe-area-inset-right)); }
.safe-mt { margin-top: max(var(--space-4, 16px), var(--safe-area-inset-top)); }
.safe-mb { margin-bottom: max(var(--space-4, 16px), var(--safe-area-inset-bottom)); }
.safe-ml { margin-left: max(var(--space-4, 16px), var(--safe-area-inset-left)); }
.safe-mr { margin-right: max(var(--space-4, 16px), var(--safe-area-inset-right)); }

/* ========================================
   SURFACE LAYERS
   Ensure Safari dynamic island compatibility
   ======================================== */
.surface-layer {
  background-color: var(--color-bg-primary, oklch(98% 0 0));
  border-radius: var(--border-radius-md, 12px);
  box-shadow: var(--shadow-sm, 0 1px 2px oklch(0% 0 0 / 0.05));
  /* Inner content avoids safe area on full bleed structures */
  padding: var(--space-4, 16px);
}


/* --- inputs.css --- */
/* ========================================
   ASTER DESIGN SYSTEM - INPUTS & FORMS
   ======================================== */

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.form-label {
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    line-height: var(--line-height-tight);
}

/* Base input styles shared across text, select, textarea */
.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--space-3);
    border: 1px solid var(--color-border-primary);
    border-radius: var(--border-radius-md);
    background: var(--color-bg-elevated);
    color: var(--color-text-primary);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    line-height: var(--line-height-base);
    transition: border-color var(--transition-fast), 
                background-color var(--transition-fast),
                box-shadow var(--transition-fast);
    box-sizing: border-box;
    appearance: none; /* remove native iOS styling for inputs */
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--color-text-tertiary);
}

/* Hover state */
.form-input:hover:not(:disabled),
.form-select:hover:not(:disabled),
.form-textarea:hover:not(:disabled) {
    border-color: var(--color-border-secondary);
}

/* Focus visible state for accessibility */
.form-input:focus-visible,
.form-select:focus-visible,
.form-textarea:focus-visible {
    outline: none;
    border-color: var(--color-text-primary);
    box-shadow: 0 0 0 2px var(--color-bg-primary), 0 0 0 4px var(--color-text-primary);
}

/* Disabled state */
.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
    background: var(--color-bg-secondary);
    color: var(--color-text-muted);
    cursor: not-allowed;
    border-color: var(--color-border-secondary);
}

/* Textarea specific */
.form-textarea {
    min-height: 96px;
    resize: vertical;
}

/* Select specific */
.form-select {
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 256 256'%3E%3Cpath fill='currentColor' d='M213.66,101.66l-80,80a8,8,0,0,1-11.32,0l-80-80A8,8,0,0,1,53.66,90.34L128,164.69l74.34-74.35a8,8,0,0,1,11.32,11.32Z'%3E%3C/path%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--space-3) center;
    background-size: 16px;
    padding-right: var(--space-8);
}

.form-select:disabled {
    opacity: 0.6;
}

/* ========================================
   CHECKBOX & RADIO
   ======================================== */
.form-checkbox-group,
.form-radio-group {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.form-checkbox,
.form-radio {
    appearance: none;
    width: 20px;
    height: 20px;
    border: 1px solid var(--color-border-primary);
    background: var(--color-bg-elevated);
    cursor: pointer;
    display: grid;
    place-content: center;
    transition: all var(--transition-fast);
    margin: 0;
}

.form-checkbox {
    border-radius: var(--border-radius-sm);
}

.form-radio {
    border-radius: var(--border-radius-full);
}

.form-checkbox::before {
    content: "";
    width: 10px;
    height: 10px;
    clip-path: polygon(14% 44%, 0 65%, 50% 100%, 100% 16%, 80% 0%, 43% 62%);
    transform: scale(0);
    transform-origin: center;
    transition: 120ms transform ease-in-out;
    background-color: var(--color-bg-primary);
}

.form-radio::before {
    content: "";
    width: 10px;
    height: 10px;
    border-radius: var(--border-radius-full);
    transform: scale(0);
    transform-origin: center;
    transition: 120ms transform ease-in-out;
    background-color: var(--color-bg-primary);
}

.form-checkbox:checked,
.form-radio:checked {
    background-color: var(--color-text-primary);
    border-color: var(--color-text-primary);
}

.form-checkbox:checked::before,
.form-radio:checked::before {
    transform: scale(1);
}

.form-checkbox:focus-visible,
.form-radio:focus-visible {
    outline: none;
    box-shadow: 0 0 0 2px var(--color-bg-primary), 0 0 0 4px var(--color-text-primary);
}

.form-checkbox:disabled,
.form-radio:disabled {
    background: var(--color-bg-secondary);
    border-color: var(--color-border-secondary);
    cursor: not-allowed;
}

.form-checkbox:disabled:checked {
    background: var(--color-border-secondary);
}

.form-checkbox:disabled:checked::before,
.form-radio:disabled:checked::before {
    background-color: var(--color-bg-secondary);
}

/* ========================================
   TOGGLE SWITCH
   ======================================== */
.form-toggle {
    appearance: none;
    width: 44px;
    height: 24px;
    background: var(--color-border-primary);
    border-radius: var(--border-radius-full);
    position: relative;
    cursor: pointer;
    outline: none;
    border: 2px solid transparent;
    transition: background-color var(--transition-fast), border-color var(--transition-fast);
    margin: 0;
}

.form-toggle::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 16px;
    height: 16px;
    background: var(--color-bg-elevated);
    border-radius: var(--border-radius-full);
    transition: transform var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.form-toggle:checked {
    background: var(--color-text-primary);
    border-color: var(--color-text-primary);
}

.form-toggle:checked::after {
    transform: translateX(20px);
    background: var(--color-bg-primary);
}

.form-toggle:focus-visible {
    outline: none;
    box-shadow: 0 0 0 2px var(--color-bg-primary), 0 0 0 4px var(--color-text-primary);
}

.form-toggle:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Inline form groups for toggles / checkboxes */
.form-inline-group {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}


/* --- buttons.css --- */
/* ========================================
   BASE BUTTON
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
    font-family: inherit;
    text-decoration: none;
    line-height: var(--line-height-tight);
    white-space: nowrap;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
    box-sizing: border-box;
}

.btn:focus-visible {
    outline: 2px solid var(--color-text-primary);
    outline-offset: 2px;
}

.btn:disabled,
.btn[disabled] {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* ========================================
   PRIMARY BUTTON
   ======================================== */
.btn-primary {
    background: var(--color-text-primary);
    color: var(--color-text-inverse);
    border-color: var(--color-text-primary);
}

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.btn-primary:active {
    transform: translateY(0) scale(0.98);
}

/* ========================================
   SECONDARY BUTTON
   ======================================== */
.btn-secondary {
    background: transparent;
    color: var(--color-text-secondary);
    border-color: var(--color-border-primary);
}

.btn-secondary:hover {
    background: var(--color-surface-hover);
    color: var(--color-text-primary);
    border-color: var(--color-border-secondary);
}

.btn-secondary:active {
    background: var(--color-surface-active);
    transform: scale(0.98);
}

/* ========================================
   ICON BUTTON (.btn-icon)
   ======================================== */
.btn-icon {
    width: 44px;
    height: 44px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    color: var(--color-text-secondary);
    border-radius: var(--border-radius-full);
    cursor: pointer;
    transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
    flex-shrink: 0;
    position: relative;
    font-family: inherit;
}

.btn-icon:hover {
    background: var(--color-surface-hover);
    color: var(--color-text-primary);
}

.btn-icon:active {
    background: var(--color-surface-active);
    transform: scale(0.95);
}

.btn-icon i {
    font-size: 20px; /* Aligns with Phosphor icons size from drafts */
}

.btn-icon:focus-visible {
    outline: 2px solid var(--color-text-primary);
    outline-offset: 2px;
}

.btn-icon:disabled,
.btn-icon[disabled] {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* ========================================
   FLOATING ACTION BUTTON (FAB)
   ======================================== */
.fab {
    width: var(--fab-size, 56px);
    height: var(--fab-size, 56px);
    background: var(--color-text-primary);
    color: var(--color-text-inverse);
    border: none;
    border-radius: var(--border-radius-full);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    cursor: pointer;
    box-shadow: var(--shadow-xl);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    flex-shrink: 0;
    font-family: inherit;
}

.fab:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-xl), 0 0 0 4px var(--color-surface-hover);
}

.fab:active {
    transform: scale(0.95);
}

.fab:focus-visible {
    outline: 2px solid var(--color-text-primary);
    outline-offset: 4px;
}

.fab:disabled,
.fab[disabled] {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
    box-shadow: none;
}

/* --- data-display.css --- */
/* ========================================
   C-DATA-DISPLAY
   ======================================== */

/* ----------------------------------------
   Cards
   ---------------------------------------- */
.card {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-secondary);
    border-radius: var(--border-radius-md);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    margin-bottom: var(--space-4);
    transition: box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.card:hover {
    border-color: var(--color-border-primary);
}

.card-header {
    padding: var(--space-4) var(--space-6);
    border-bottom: 1px solid var(--color-border-secondary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
}

.card-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin: 0;
}

.card-subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-top: var(--space-1);
}

.card-body {
    padding: var(--space-6);
    flex: 1;
}

.card-footer {
    padding: var(--space-4) var(--space-6);
    border-top: 1px solid var(--color-border-secondary);
    background: var(--color-bg-secondary);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-3);
}

/* ----------------------------------------
   Data Tables
   ---------------------------------------- */
.table-wrapper {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: var(--border-radius-md);
    border: 1px solid var(--color-border-secondary);
    background: var(--color-bg-elevated);
    margin-bottom: var(--space-4);
}

.table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
    min-width: 600px;
}

.table th,
.table td {
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--color-border-secondary);
    vertical-align: middle;
}

.table th {
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    background: var(--color-bg-secondary);
    white-space: nowrap;
}

.table tbody tr:last-child td {
    border-bottom: none;
}

.table tbody tr {
    transition: background-color var(--transition-fast);
}

.table tbody tr:hover td {
    background: var(--color-surface-hover);
}

.table-cell-actions {
    text-align: right;
    white-space: nowrap;
}

/* ----------------------------------------
   Badges
   ---------------------------------------- */
.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 2px var(--space-2);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    line-height: var(--line-height-tight);
    border-radius: var(--border-radius-full);
    white-space: nowrap;
    background: var(--color-bg-secondary);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border-secondary);
}

.badge-primary {
    background: var(--color-text-primary);
    color: var(--color-text-inverse);
    border-color: var(--color-text-primary);
}

.badge-success {
    color: var(--color-success);
    border-color: var(--color-success);
    background: transparent;
}

.badge-warning {
    color: var(--color-warning);
    border-color: var(--color-warning);
    background: transparent;
}

.badge-error {
    color: var(--color-error);
    border-color: var(--color-error);
    background: transparent;
}

.badge-icon {
    margin-right: var(--space-1);
    font-size: 14px;
}

/* ----------------------------------------
   Tooltips
   ---------------------------------------- */
.tooltip-trigger {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: help;
}

.tooltip {
    position: absolute;
    bottom: calc(100% + var(--space-2));
    left: 50%;
    transform: translateX(-50%) translateY(4px);
    opacity: 0;
    visibility: hidden;
    background: var(--color-text-primary);
    color: var(--color-text-inverse);
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    border-radius: var(--border-radius-sm);
    white-space: nowrap;
    pointer-events: none;
    z-index: 100;
    transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border-width: 4px;
    border-style: solid;
    border-color: var(--color-text-primary) transparent transparent transparent;
}

.tooltip-trigger:hover .tooltip,
.tooltip-trigger:focus-visible .tooltip,
.tooltip-trigger:focus-within .tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

/* Tooltip placements */
.tooltip-right {
    bottom: 50%;
    left: calc(100% + var(--space-2));
    transform: translateY(50%) translateX(-4px);
}
.tooltip-right::after {
    top: 50%;
    left: 0;
    transform: translateY(-50%) translateX(-100%);
    border-color: transparent var(--color-text-primary) transparent transparent;
}
.tooltip-trigger:hover .tooltip-right,
.tooltip-trigger:focus-visible .tooltip-right,
.tooltip-trigger:focus-within .tooltip-right {
    transform: translateY(50%) translateX(0);
}

.tooltip-left {
    bottom: 50%;
    right: calc(100% + var(--space-2));
    left: auto;
    transform: translateY(50%) translateX(4px);
}
.tooltip-left::after {
    top: 50%;
    left: 100%;
    transform: translateY(-50%);
    border-color: transparent transparent transparent var(--color-text-primary);
}
.tooltip-trigger:hover .tooltip-left,
.tooltip-trigger:focus-visible .tooltip-left,
.tooltip-trigger:focus-within .tooltip-left {
    transform: translateY(50%) translateX(0);
}

.tooltip-bottom {
    top: calc(100% + var(--space-2));
    bottom: auto;
    left: 50%;
    transform: translateX(-50%) translateY(-4px);
}
.tooltip-bottom::after {
    bottom: 100%;
    top: auto;
    left: 50%;
    transform: translateX(-50%);
    border-color: transparent transparent var(--color-text-primary) transparent;
}
.tooltip-trigger:hover .tooltip-bottom,
.tooltip-trigger:focus-visible .tooltip-bottom,
.tooltip-trigger:focus-within .tooltip-bottom {
    transform: translateX(-50%) translateY(0);
}


/* --- feedback.css --- */
/* ========================================
   SKELETON LOADER
   ======================================== */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--color-bg-secondary) 0%,
        var(--color-bg-tertiary) 50%,
        var(--color-bg-secondary) 100%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite linear;
    border-radius: var(--border-radius-md);
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-text {
    height: var(--line-height-base);
    margin-bottom: var(--space-2);
    border-radius: var(--border-radius-sm);
}

.skeleton-avatar {
    width: var(--space-10);
    height: var(--space-10);
    border-radius: var(--border-radius-full);
}

.skeleton-title {
    height: var(--font-size-xl);
    width: 60%;
    margin-bottom: var(--space-4);
    border-radius: var(--border-radius-sm);
}

/* ========================================
   SPINNER
   ======================================== */
.spinner {
    display: inline-block;
    width: var(--space-6);
    height: var(--space-6);
    border: 2px solid var(--color-border-primary);
    border-top-color: var(--color-text-primary);
    border-radius: var(--border-radius-full);
    animation: spinner-spin 0.8s infinite linear;
    flex-shrink: 0;
}

.spinner-sm {
    width: var(--space-4);
    height: var(--space-4);
    border-width: 1.5px;
}

.spinner-lg {
    width: var(--space-8);
    height: var(--space-8);
    border-width: 3px;
}

@keyframes spinner-spin {
    to { transform: rotate(360deg); }
}

/* ========================================
   ALERTS
   ======================================== */
.alert {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-4);
    border-radius: var(--border-radius-md);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border-primary);
    color: var(--color-text-primary);
    transition: all var(--transition-fast);
}

.alert-icon {
    flex-shrink: 0;
    font-size: 20px;
    margin-top: 2px;
}

.alert-content {
    flex: 1;
    min-width: 0;
}

.alert-title {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-1);
    color: var(--color-text-primary);
}

.alert-message {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
}

/* Alert Variants */
.alert-success {
    border-color: var(--color-success);
    background: oklch(from var(--color-success) l c h / 0.1);
}
.alert-success .alert-icon,
.alert-success .alert-title {
    color: var(--color-success);
}

.alert-warning {
    border-color: var(--color-warning);
    background: oklch(from var(--color-warning) l c h / 0.1);
}
.alert-warning .alert-icon,
.alert-warning .alert-title {
    color: var(--color-warning);
}

.alert-error {
    border-color: var(--color-error);
    background: oklch(from var(--color-error) l c h / 0.1);
}
.alert-error .alert-icon,
.alert-error .alert-title {
    color: var(--color-error);
}

.alert-info {
    border-color: var(--color-text-primary);
    background: oklch(from var(--color-text-primary) l c h / 0.05);
}
.alert-info .alert-icon,
.alert-info .alert-title {
    color: var(--color-text-primary);
}

/* ========================================
   MODAL DIALOGS
   ======================================== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: var(--color-bg-overlay);
    z-index: 150;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-smooth);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.modal-overlay.visible {
    opacity: 1;
    pointer-events: auto;
}

.modal {
    width: 100%;
    max-width: 480px;
    max-height: 90vh;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-secondary);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    transform: scale(0.95) translateY(20px);
    transition: transform var(--transition-smooth);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

.modal-overlay.visible .modal {
    transform: scale(1) translateY(0);
}

.modal-header {
    padding: var(--space-6);
    border-bottom: 1px solid var(--color-border-secondary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

.modal-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    margin: 0;
}

.modal-subtitle {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-4);
}

.modal-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
    border-radius: var(--border-radius-full);
    cursor: pointer;
    transition: background-color var(--transition-fast), color var(--transition-fast);
    flex-shrink: 0;
}

.modal-close:hover {
    background: var(--color-surface-hover);
}

.modal-close:active {
    background: var(--color-surface-active);
}

.modal-close i {
    font-size: 20px;
}

.modal-body {
    padding: var(--space-6);
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
}

.modal-footer {
    padding: var(--space-4) var(--space-6);
    border-top: 1px solid var(--color-border-secondary);
    display: flex;
    gap: var(--space-3);
    justify-content: flex-end;
    background: var(--color-bg-elevated);
    flex-shrink: 0;
}

/* Focus Trapping Utilities */
.modal:focus-visible {
    outline: none;
}

/* Modal Mobile Adjustments */
@media (max-width: 768px) {
    .modal-overlay {
        padding: var(--space-6);
    }

    .modal {
        max-width: 100%;
        max-height: calc(100vh - var(--safe-area-inset-top) - var(--safe-area-inset-bottom) - var(--space-8));
    }

    .modal-header {
        padding: var(--space-5);
    }

    .modal-body {
        padding: var(--space-5);
    }
    
    .modal-footer {
        padding: var(--space-4) var(--space-5);
        flex-direction: column-reverse;
    }
    
    .modal-footer .btn {
        width: 100%;
    }

    .modal-title {
        font-size: var(--font-size-xl);
    }

    .modal-subtitle {
        font-size: var(--font-size-base);
    }
}


/* --- navigation.css --- */
/* ========================================
   FLOATING NAVBAR
   ======================================== */
.navbar {
    position: fixed;
    top: var(--space-4);
    left: var(--space-4);
    right: var(--space-4);
    height: var(--navbar-height);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-secondary);
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-4);
    gap: var(--space-4);
    z-index: 100;
    transition: box-shadow var(--transition-base);
}

.navbar.elevated {
    box-shadow: var(--shadow-lg);
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    text-decoration: none;
    white-space: nowrap;
    min-width: 0;
    flex-shrink: 0;
}

.navbar-logo {
    width: 32px;
    height: 32px;
    background: var(--color-text-primary);
    border-radius: var(--border-radius-sm);
    flex-shrink: 0;
}

.navbar-title {
    overflow: hidden;
    text-overflow: ellipsis;
}

.navbar-search {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 480px;
    max-width: calc(100% - 240px);
    min-width: 120px;
}

.navbar-search input {
    width: 100%;
    height: 40px;
    padding: 0 var(--space-4) 0 var(--space-10);
    border: 1px solid var(--color-border-primary);
    border-radius: var(--border-radius-full);
    background: var(--color-bg-secondary);
    color: var(--color-text-primary);
    font-family: inherit;
    font-size: var(--font-size-sm);
    transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.navbar-search input:hover {
    background: var(--color-surface-hover);
}

.navbar-search input:focus {
    outline: none;
    border-color: var(--color-text-primary);
    background: var(--color-bg-elevated);
}

.navbar-search-icon {
    position: absolute;
    left: var(--space-3);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-tertiary);
    pointer-events: none;
}

.navbar-actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    flex-shrink: 0;
}

.navbar-btn {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    color: var(--color-text-secondary);
    border-radius: var(--border-radius-full);
    cursor: pointer;
    transition: background-color var(--transition-fast), color var(--transition-fast);
    flex-shrink: 0;
    position: relative;
}

.navbar-btn:hover {
    background: var(--color-surface-hover);
    color: var(--color-text-primary);
}

.navbar-btn:active {
    background: var(--color-surface-active);
}

.navbar-btn i {
    font-size: 20px;
}

/* Notifications Badge - Simple Dot Indicator */
.navbar-btn-badge {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 8px;
    height: 8px;
    background: var(--color-text-primary);
    border-radius: var(--border-radius-full);
    border: 2px solid var(--color-bg-elevated);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

/* User Avatar Button */
.user-avatar-btn {
    width: 36px;
    height: 36px;
    padding: 0;
    overflow: hidden;
}

.user-avatar {
    width: 100%;
    height: 100%;
    border-radius: var(--border-radius-full);
    background: var(--color-bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-secondary);
}

/* Mobile Navbar Adaptations */
@media (max-width: 768px) {
    .navbar {
        top: max(var(--safe-area-inset-top), var(--space-3));
        left: var(--space-3);
        right: var(--space-3);
        padding: 0 var(--space-3);
        gap: var(--space-2);
        justify-content: flex-start;
    }
    
    .navbar-brand {
        flex-shrink: 0;
    }
    
    .navbar-title {
        display: none;
    }
    
    .navbar-search {
        position: relative;
        left: auto;
        transform: none;
        flex: 1 1 0;
        max-width: none;
        min-width: 80px;
    }
    
    .navbar-search input {
        font-size: var(--font-size-xs);
        height: 40px;
        padding-left: var(--space-8);
    }
    
    .navbar-actions {
        flex-shrink: 0;
        margin-left: auto;
    }
    
    .navbar-btn {
        width: 40px;
        height: 40px;
    }

    .user-avatar-btn {
        width: 36px;
        height: 36px;
    }
}

/* Small Mobile Navbar Adaptations */
@media (max-width: 480px) {
    .navbar {
        gap: var(--space-1);
        padding: 0 var(--space-2);
        justify-content: flex-start;
    }
    
    .navbar-search {
        position: relative;
        left: auto;
        transform: none;
        min-width: 60px;
    }
    
    .navbar-search input {
        padding-left: var(--space-6);
        font-size: var(--font-size-xs);
    }
    
    .navbar-btn {
        width: 36px;
        height: 36px;
    }
    
    .navbar-btn i {
        font-size: 18px;
    }
    
    .user-avatar-btn {
        width: 32px;
        height: 32px;
    }
}

/* ========================================
   DROPDOWN MENU SYSTEM
   ======================================== */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + var(--space-2));
    right: 0;
    width: 320px;
    max-height: 480px;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-secondary);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    opacity: 0;
    transform: translateY(-8px);
    pointer-events: none;
    transition: opacity var(--transition-base), transform var(--transition-base);
    z-index: 200;
    display: flex;
    flex-direction: column;
}

.dropdown.open .dropdown-menu {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.dropdown-header {
    padding: var(--space-4);
    border-bottom: 1px solid var(--color-border-secondary);
    flex-shrink: 0;
}

.dropdown-header h4 {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
}

.dropdown-body {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
}

.dropdown-footer {
    padding: var(--space-3);
    border-top: 1px solid var(--color-border-secondary);
    flex-shrink: 0;
}

/* Notification Tabs */
.notification-tabs {
    display: flex;
    gap: var(--space-1);
    padding: var(--space-3) var(--space-4) 0;
    border-bottom: 1px solid var(--color-border-secondary);
}

.notification-tab {
    flex: 1;
    padding: var(--space-2) var(--space-3);
    background: transparent;
    border: none;
    color: var(--color-text-tertiary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: color var(--transition-fast), border-color var(--transition-fast);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.notification-tab:hover {
    color: var(--color-text-secondary);
}

.notification-tab.active {
    color: var(--color-text-primary);
    border-bottom-color: var(--color-text-primary);
}

.notification-panel {
    display: none;
}

.notification-panel.active {
    display: block;
}

.notification-list {
    list-style: none;
}

.notification-item {
    padding: var(--space-4);
    border-bottom: 1px solid var(--color-border-secondary);
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.notification-item:last-child {
    border-bottom: none;
}

.notification-item:hover {
    background: var(--color-surface-hover);
}

.notification-item.unread {
    background: var(--color-bg-secondary);
}

.notification-item-header {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    margin-bottom: var(--space-2);
}

.notification-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--border-radius-full);
    background: var(--color-bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    flex-shrink: 0;
}

.notification-content {
    flex: 1;
    min-width: 0;
}

.notification-title {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    margin-bottom: var(--space-1);
}

.notification-message {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: var(--line-height-base);
}

.notification-time {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
    margin-top: var(--space-1);
}

/* Account Menu */
.account-menu-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4);
    border-bottom: 1px solid var(--color-border-secondary);
}

.account-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-full);
    background: var(--color-bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-secondary);
    flex-shrink: 0;
}

.account-info {
    flex: 1;
    min-width: 0;
}

.account-name {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: 2px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.account-email {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.account-menu-list {
    list-style: none;
    padding: var(--space-2) 0;
}

.account-menu-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.account-menu-item:hover {
    background: var(--color-surface-hover);
    color: var(--color-text-primary);
}

.account-menu-item i {
    font-size: 20px;
    flex-shrink: 0;
}

.account-menu-divider {
    height: 1px;
    background: var(--color-border-secondary);
    margin: var(--space-2) 0;
}

@media (max-width: 768px) {
    .dropdown-menu {
        position: fixed;
        top: calc(var(--navbar-height) + var(--space-4) + max(var(--safe-area-inset-top), var(--space-3)));
        left: var(--space-3);
        right: var(--space-3);
        width: auto;
        max-height: calc(100vh - var(--navbar-height) - var(--space-12) - max(var(--safe-area-inset-top), var(--space-3)));
    }
}

/* ========================================
   SIDEBAR NAVIGATION
   ======================================== */
.sidebar {
    position: fixed;
    top: calc(var(--navbar-height) + var(--space-8));
    left: var(--space-4);
    width: var(--sidebar-width);
    height: calc(100vh - var(--navbar-height) - var(--space-12));
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-secondary);
    border-radius: var(--border-radius-lg);
    padding: var(--space-4);
    z-index: 90;
    transition: transform var(--transition-smooth), opacity var(--transition-smooth);
    overflow-y: auto;
    overflow-x: hidden;
}

.sidebar.collapsed {
    transform: translateX(calc(-100% - var(--space-4)));
    opacity: 0;
    pointer-events: none;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.sidebar-item {
    position: relative;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    border-radius: var(--border-radius-sm);
    transition: background-color var(--transition-fast), color var(--transition-fast);
    white-space: nowrap;
    overflow: hidden;
}

.sidebar-link:hover {
    background: var(--color-surface-hover);
    color: var(--color-text-primary);
}

.sidebar-link.active {
    background: var(--color-surface-active);
    color: var(--color-text-primary);
}

.sidebar-link i {
    flex-shrink: 0;
    font-size: 20px;
}

.sidebar-link span {
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-dropdown-toggle {
    position: absolute;
    right: var(--space-2);
    top: 50%;
    transform: translateY(-50%);
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    color: var(--color-text-tertiary);
    cursor: pointer;
    border-radius: var(--border-radius-sm);
    transition: transform var(--transition-fast), background-color var(--transition-fast);
}

.sidebar-dropdown-toggle:hover {
    background: var(--color-surface-hover);
}

.sidebar-item.open .sidebar-dropdown-toggle {
    transform: translateY(-50%) rotate(180deg);
}

.sidebar-submenu {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-smooth);
}

.sidebar-item.open .sidebar-submenu {
    max-height: 500px;
}

.sidebar-submenu-list {
    padding-left: var(--space-8);
    padding-top: var(--space-1);
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.sidebar-submenu-link {
    display: block;
    padding: var(--space-2) var(--space-3);
    color: var(--color-text-tertiary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    border-radius: var(--border-radius-sm);
    transition: background-color var(--transition-fast), color var(--transition-fast);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-submenu-link:hover {
    background: var(--color-surface-hover);
    color: var(--color-text-primary);
}

@media (max-width: 768px) {
    .sidebar {
        top: var(--space-20);
        width: calc(100% - var(--space-8));
        height: 87vh;
        height: 87dvh;
    }
    
    .sidebar.collapsed {
        transform: translateX(-100%);
    }
}

/* ========================================
   BACKDROP
   ======================================== */
.backdrop {
    position: fixed;
    inset: 0;
    background: var(--color-bg-overlay);
    z-index: 85;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-smooth);
    backdrop-filter: blur(4px);
}

.backdrop.visible {
    opacity: 1;
    pointer-events: auto;
}

/* ========================================
   MAIN CONTENT
   ======================================== */
.main-content {
    margin-top: calc(var(--navbar-height) + var(--space-8));
    margin-left: calc(var(--sidebar-width) + var(--space-8));
    margin-right: var(--space-4);
    margin-bottom: var(--space-8);
    padding: var(--space-6);
    transition: margin-left var(--transition-smooth);
}

.main-content.sidebar-collapsed {
    margin-left: var(--space-4);
}

@media (max-width: 768px) {
    .main-content {
        margin-left: var(--space-3);
        margin-right: var(--space-3);
        margin-top: calc(var(--navbar-height) + var(--space-6) + var(--safe-area-inset-top));
        padding: var(--space-4);
    }
    
    .main-content.sidebar-collapsed {
        margin-left: var(--space-3);
    }
}

/* ========================================
   GLOBAL RESET & BASE STYLES
   ======================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-base);
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    overflow-x: hidden;
}

*:focus-visible {
    outline: 2px solid var(--color-text-primary);
    outline-offset: 2px;
}

/* ========================================
   LAYOUT STRUCTURE
   ======================================== */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.content-section {
    max-width: 1200px;
    margin-bottom: var(--space-12);
}

.content-section h2 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-4);
    color: var(--color-text-primary);
}

.content-section p {
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--space-4);
}

.content-card {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-secondary);
    border-radius: var(--border-radius-md);
    padding: var(--space-6);
    margin-bottom: var(--space-4);
}


/* --- patterns.css --- */
/* ========================================
   EMPTY STATES
   ======================================== */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--space-12) var(--space-6);
    background: var(--color-bg-secondary);
    border: 1px dashed var(--color-border-secondary);
    border-radius: var(--border-radius-lg);
    gap: var(--space-4);
    width: 100%;
    box-sizing: border-box;
}

.empty-state-icon {
    font-size: 48px;
    color: var(--color-text-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.empty-state-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin: 0;
    line-height: var(--line-height-tight);
}

.empty-state-desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    max-width: 400px;
    margin: 0;
    line-height: var(--line-height-relaxed);
}

.empty-state-actions {
    margin-top: var(--space-2);
    display: flex;
    gap: var(--space-3);
    justify-content: center;
    flex-wrap: wrap;
}

/* ========================================
   ERROR BOUNDARIES
   ======================================== */
.error-boundary {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-6);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-error);
    border-left: 4px solid var(--color-error);
    border-radius: var(--border-radius-md);
    gap: var(--space-3);
    width: 100%;
    box-sizing: border-box;
}

.error-boundary-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    width: 100%;
}

.error-boundary-icon {
    font-size: 24px;
    color: var(--color-error);
    display: flex;
    align-items: center;
    justify-content: center;
}

.error-boundary-title {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin: 0;
    line-height: var(--line-height-tight);
}

.error-boundary-desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin: 0;
    line-height: var(--line-height-base);
    max-width: 600px;
}

.error-boundary-actions {
    margin-top: var(--space-2);
    display: flex;
    gap: var(--space-3);
}

/* ========================================
   CRUD MODALS
   ======================================== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: var(--color-bg-overlay);
    z-index: 150;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-smooth);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px); /* Safari support */
}

.modal-overlay.visible {
    opacity: 1;
    pointer-events: auto;
}

.modal {
    width: 100%;
    max-width: 480px;
    max-height: 90vh;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-secondary);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    transform: scale(0.95) translateY(20px);
    transition: transform var(--transition-smooth);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative; /* Safari Full-Bleed */
}

.modal-overlay.visible .modal {
    transform: scale(1) translateY(0);
}

.modal-header {
    padding: var(--space-6);
    border-bottom: 1px solid var(--color-border-secondary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
    background: var(--color-bg-elevated);
}

.modal-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    margin: 0;
    line-height: var(--line-height-tight);
}

.modal-subtitle {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin: 0 0 var(--space-4) 0;
    line-height: var(--line-height-tight);
}

.modal-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
    border-radius: var(--border-radius-full);
    cursor: pointer;
    transition: background-color var(--transition-fast), color var(--transition-fast);
    flex-shrink: 0;
}

.modal-close:hover {
    background: var(--color-surface-hover);
}

.modal-close:active {
    background: var(--color-surface-active);
}

.modal-close i {
    font-size: 20px;
}

.modal-close:focus-visible {
    outline: 2px solid var(--color-text-primary);
    outline-offset: 2px;
}

.modal-breadcrumbs {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-6);
    border-bottom: 1px solid var(--color-border-secondary);
    background: var(--color-bg-secondary);
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    position: sticky;
    top: 0;
    z-index: 10;
    flex-shrink: 0;
}

.modal-breadcrumbs.hidden {
    display: none;
}

.modal-breadcrumb-back {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    color: var(--color-text-secondary);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: background-color var(--transition-fast), color var(--transition-fast);
    margin-right: var(--space-1);
    flex-shrink: 0;
}

.modal-breadcrumb-back:hover {
    background: var(--color-surface-hover);
    color: var(--color-text-primary);
}

.modal-breadcrumb-text {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    flex: 1;
    min-width: 0;
}

.modal-breadcrumb-link {
    color: var(--color-text-tertiary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.modal-breadcrumb-link:hover {
    color: var(--color-text-primary);
}

.modal-body {
    padding: var(--space-6);
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch; /* Safari scroll smoothness */
}

.modal-view {
    display: none;
}

.modal-view.active {
    display: block;
    animation: modalViewSlideIn var(--transition-base) ease-out;
}

@keyframes modalViewSlideIn {
    from {
        opacity: 0;
        transform: translateX(16px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.create-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
}

.create-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-6);
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border-secondary);
    border-radius: var(--border-radius-md);
    text-decoration: none;
    transition: border-color var(--transition-fast), transform var(--transition-fast), background-color var(--transition-fast);
}

.create-option:hover,
.create-option:focus-visible {
    border-color: var(--color-text-primary);
    transform: translateY(-2px);
    background: var(--color-surface-hover);
    outline: none;
}

.create-option:focus-visible {
    outline: 2px solid var(--color-text-primary);
    outline-offset: 2px;
}

.create-option-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-tertiary);
    border-radius: var(--border-radius-full);
    color: var(--color-text-primary);
    font-size: 24px;
    transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.create-option:hover .create-option-icon {
    background: var(--color-text-primary);
    color: var(--color-bg-primary);
    transform: scale(1.05);
}

.create-option-label {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
}

.modal-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

/* Modals Mobile Fallback (Safari full-bleed / safe-area handling) */
@media (max-width: 768px) {
    .modal-overlay {
        padding: var(--space-4);
        align-items: flex-end; /* Bottom sheet approach */
    }

    .modal {
        max-width: 100%;
        max-height: 85vh; /* Safe area from keyboard */
        border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
        /* Safari Full-bleed bottom safe area clearance */
        margin-bottom: env(safe-area-inset-bottom);
    }

    .modal-header,
    .modal-body,
    .modal-breadcrumbs {
        padding-left: max(var(--space-5), env(safe-area-inset-left));
        padding-right: max(var(--space-5), env(safe-area-inset-right));
    }
}

/* --- app-shell.css --- */
/* ========================================
           CHAT PANEL
           ======================================== */
        .chat-panel {
            position: fixed;
            top: var(--space-20);
            right: var(--space-4);
            width: var(--chat-width);
            height: calc(90vh - var(--space-8));
            background: var(--color-bg-elevated);
            border: 1px solid var(--color-border-secondary);
            border-radius: var(--border-radius-lg);
            display: flex;
            flex-direction: column;
            z-index: 95;
            box-shadow: var(--shadow-xl);
            transform: translateX(calc(100% + var(--space-4)));
            opacity: 0;
            pointer-events: none;
            transition: transform var(--transition-smooth), opacity var(--transition-smooth);
        }
        
        .chat-panel.open {
            transform: translateX(0);
            opacity: 1;
            pointer-events: auto;
        }
        
        .chat-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: var(--space-4);
            border-bottom: 1px solid var(--color-border-secondary);
            flex-shrink: 0;
        }

        .chat-header-actions {
            display: flex;
            align-items: center;
            gap: var(--space-1);
        }
        
        .chat-header-title {
            display: flex;
            align-items: center;
            gap: var(--space-3);
        }
        
        .chat-header-title i {
            font-size: 24px;
            color: var(--color-text-primary);
        }
        
        .chat-header-title h3 {
            font-size: var(--font-size-lg);
            font-weight: var(--font-weight-semibold);
            color: var(--color-text-primary);
        }
        
        .chat-close-btn {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: none;
            background: transparent;
            color: var(--color-text-secondary);
            border-radius: var(--border-radius-full);
            cursor: pointer;
            transition: background-color var(--transition-fast), color var(--transition-fast);
            flex-shrink: 0;
        }
        
        .chat-close-btn:hover {
            background: var(--color-surface-hover);
            color: var(--color-text-primary);
        }

        .chat-minimize-btn {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: none;
            background: transparent;
            color: var(--color-text-secondary);
            border-radius: var(--border-radius-full);
            cursor: pointer;
            transition: background-color var(--transition-fast), color var(--transition-fast);
            flex-shrink: 0;
        }
        
        .chat-minimize-btn:hover {
            background: var(--color-surface-hover);
            color: var(--color-text-primary);
        }

        /* Minimized Chat State */
        .chat-panel.minimized {
            width: 320px;
            height: auto;
            top: auto;
            bottom: var(--space-6);
            transform: translateX(0);
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-lg);
        }

        .chat-panel.minimized .chat-messages,
        .chat-panel.minimized .chat-input-wrapper {
            display: none;
        }

        .chat-panel.minimized .chat-header {
            cursor: pointer;
            border-bottom: none;
            transition: background-color var(--transition-fast);
            border-radius: var(--border-radius-lg);
        }

        .chat-panel.minimized .chat-header:hover {
            background: var(--color-surface-hover);
        }

        .chat-panel.minimized .chat-header:active {
            background: var(--color-surface-active);
        }
        
        .chat-messages {
            flex: 1;
            overflow-y: auto;
            overflow-x: hidden;
            padding: var(--space-4);
            display: flex;
            flex-direction: column;
            gap: var(--space-4);
        }
        
        .chat-message {
            display: flex;
            gap: var(--space-3);
            animation: messageSlideIn var(--transition-base) ease-out;
        }
        
        @keyframes messageSlideIn {
            from {
                opacity: 0;
                transform: translateY(8px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        .chat-message.user {
            flex-direction: row-reverse;
        }
        
        .chat-message-avatar {
            width: 32px;
            height: 32px;
            border-radius: var(--border-radius-full);
            background: var(--color-bg-tertiary);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            color: var(--color-text-secondary);
            font-size: 16px;
        }
        
        .chat-message.user .chat-message-avatar {
            background: var(--color-text-primary);
            color: var(--color-text-inverse);
        }
        
        .chat-message-content {
            flex: 1;
            min-width: 0;
        }
        
        .chat-message-bubble {
            background: var(--color-bg-secondary);
            border: 1px solid var(--color-border-secondary);
            border-radius: var(--border-radius-md);
            padding: var(--space-3);
            color: var(--color-text-primary);
            font-size: var(--font-size-sm);
            line-height: var(--line-height-relaxed);
            word-wrap: break-word;
        }
        
        .chat-message.user .chat-message-bubble {
            background: var(--color-text-primary);
            color: var(--color-text-inverse);
            border-color: var(--color-text-primary);
        }
        
        .chat-message-time {
            font-size: var(--font-size-xs);
            color: var(--color-text-tertiary);
            margin-top: var(--space-1);
            padding: 0 var(--space-1);
        }
        
        .chat-message.user .chat-message-time {
            text-align: right;
        }
        
        .chat-input-wrapper {
            padding: var(--space-4);
            border-top: 1px solid var(--color-border-secondary);
            flex-shrink: 0;
        }
        
        .chat-input-form {
            display: flex;
            gap: var(--space-2);
            align-items: flex-end;
        }
        
        .chat-input {
            flex: 1;
            min-height: 40px;
            max-height: 120px;
            padding: var(--space-3);
            border: 1px solid var(--color-border-primary);
            border-radius: var(--border-radius-md);
            background: var(--color-bg-secondary);
            color: var(--color-text-primary);
            font-family: inherit;
            font-size: var(--font-size-sm);
            resize: none;
            transition: border-color var(--transition-fast), background-color var(--transition-fast);
        }
        
        .chat-input:focus {
            outline: none;
            border-color: var(--color-text-primary);
            background: var(--color-bg-elevated);
        }
        
        .chat-send-btn {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: none;
            background: var(--color-text-primary);
            color: var(--color-text-inverse);
            border-radius: var(--border-radius-md);
            cursor: pointer;
            transition: transform var(--transition-fast), opacity var(--transition-fast);
            flex-shrink: 0;
        }
        
        .chat-send-btn:hover {
            transform: scale(1.05);
        }
        
        .chat-send-btn:active {
            transform: scale(0.95);
        }
        
        .chat-send-btn:disabled {
            opacity: 0.5;
            cursor: not-allowed;
        }
        
        @media (max-width: 768px) {
            .chat-panel {
                left: var(--space-4);
                right: 0;
                width: calc(100% - var(--space-8));
                height: 87vh;
                height: 87dvh;
                transform: translateY(100%);
            }
            
            .chat-panel.open {
                transform: translateY(0);
            }

            .chat-panel.minimized {
                width: calc(100% - var(--space-8));
                bottom: calc(var(--space-6) + var(--safe-area-inset-bottom));
                height: auto;
                transform: translateY(0);
            }
            
            .chat-header {
                padding-top: calc(var(--space-4) + var(--safe-area-inset-top));
            }

            .chat-panel.minimized .chat-header {
                padding-top: var(--space-4);
            }
            
            .chat-input-wrapper {
                padding-bottom: calc(var(--space-4) + var(--safe-area-inset-bottom));
            }
        }
        
        
/* ========================================
   APPLICATION SHELL
   ======================================== */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}



/* SIZES */
.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-xs);
    border-radius: var(--border-radius-sm);
}

.btn-icon.btn-sm {
    width: 32px;
    height: 32px;
    padding: 0;
}
.btn-icon.btn-sm i {
    font-size: 16px;
}