/* ========================================
   MODERN DESIGN SYSTEM - CSS VARIABLES
   Material Design 3 + CRM App Sync
   ======================================== */

:root {
  /* ===== COLOR PALETTE - PRIMARY ===== */
  --color-primary: #1565C0;
  --color-primary-dark: #0D47A1;
  --color-primary-light: #42A5F5;
  --color-primary-lighter: #E3F2FD;

  /* ===== COLOR PALETTE - SECONDARY ===== */
  --color-secondary: #00897B;
  --color-secondary-dark: #004D40;
  --color-secondary-light: #26C6DA;
  --color-secondary-lighter: #E0F2F1;

  /* ===== COLOR PALETTE - TERTIARY ===== */
  --color-tertiary: #E65100;
  --color-tertiary-dark: #BF360C;
  --color-tertiary-light: #FB8C00;
  --color-tertiary-lighter: #FFE0B2;

  /* ===== STATUS COLORS ===== */
  --color-success: #2E7D32;
  --color-success-dark: #1B5E20;
  --color-success-light: #66BB6A;
  --color-success-lighter: #C8E6C9;

  --color-warning: #F57C00;
  --color-warning-dark: #E65100;
  --color-warning-light: #FFB74D;
  --color-warning-lighter: #FFE0B2;

  --color-error: #B71C1C;
  --color-error-dark: #7F0000;
  --color-error-light: #EF5350;
  --color-error-lighter: #FFCDD2;

  --color-info: #1976D2;
  --color-info-dark: #1565C0;
  --color-info-light: #64B5F6;
  --color-info-lighter: #BBDEFB;

  /* ===== NEUTRAL COLORS - LIGHT MODE ===== */
  --color-surface: #FFFFFF;
  --color-surface-variant: #F5F5F5;
  --color-surface-dim: #EEEEEE;
  --color-on-surface: #212121;
  --color-on-surface-variant: #666666;
  --color-outline: #CCCCCC;
  --color-outline-light: #E0E0E0;

  /* ===== SPACING SYSTEM (8er Basis) ===== */
  --space-xs: 0.25rem;     /* 4px */
  --space-sm: 0.5rem;      /* 8px */
  --space-md: 0.75rem;     /* 12px */
  --space-lg: 1rem;        /* 16px */
  --space-xl: 1.25rem;     /* 20px */
  --space-2xl: 1.5rem;     /* 24px */
  --space-3xl: 2rem;       /* 32px */
  --space-4xl: 2.5rem;     /* 40px */
  --space-5xl: 3rem;       /* 48px */

  /* ===== BORDER RADIUS ===== */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 20px;
  --radius-3xl: 24px;
  --radius-full: 9999px;

  /* ===== SHADOWS (Elevation) ===== */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1), 0 10px 10px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.15);

  /* ===== SPECIAL EFFECTS ===== */
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-backdrop: blur(10px);
  --glass-border: 1px solid rgba(255, 255, 255, 0.2);

  --neumorphic-light: inset 2px 2px 5px rgba(255, 255, 255, 0.7),
                      inset -2px -2px 5px rgba(0, 0, 0, 0.1);

  /* ===== TYPOGRAPHY ===== */
  --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  --font-family-mono: 'Menlo', 'Monaco', 'Courier New', monospace;

  /* Font Sizes (Modular Scale 1.125) */
  --text-xs: 0.75rem;      /* 12px */
  --text-sm: 0.875rem;     /* 14px */
  --text-base: 1rem;       /* 16px */
  --text-lg: 1.125rem;     /* 18px */
  --text-xl: 1.25rem;      /* 20px */
  --text-2xl: 1.5rem;      /* 24px */
  --text-3xl: 1.875rem;    /* 30px */
  --text-4xl: 2.25rem;     /* 36px */
  --text-5xl: 3rem;        /* 48px */

  /* Font Weights */
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Line Heights */
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.8;

  /* ===== TRANSITIONS & ANIMATIONS ===== */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;

  /* ===== BREAKPOINTS ===== */
  --breakpoint-sm: 480px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;

  /* ===== Z-INDEX SCALE ===== */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  --z-fab: 999;
}

/* ===== DARK MODE ===== */
[data-theme="dark"] {
  /* Neutral Colors - Dark Mode */
  --color-surface: #121212;
  --color-surface-variant: #1E1E1E;
  --color-surface-dim: #2A2A2A;
  --color-on-surface: #FFFFFF;
  --color-on-surface-variant: #BDBDBD;
  --color-outline: #424242;
  --color-outline-light: #616161;

  /* Adjusted Light Colors for Dark Mode */
  --color-primary-lighter: #1A237E;
  --color-secondary-lighter: #004D40;
  --color-tertiary-lighter: #BF360C;
  --color-success-lighter: #1B5E20;
  --color-warning-lighter: #E65100;
  --color-error-lighter: #7F0000;
  --color-info-lighter: #0D47A1;

  /* Glass Effect Adjustment */
  --glass-bg: rgba(30, 30, 30, 0.8);
  --glass-border: 1px solid rgba(255, 255, 255, 0.1);

  /* Neumorphic Adjustment */
  --neumorphic-light: inset 2px 2px 5px rgba(0, 0, 0, 0.5),
                      inset -2px -2px 5px rgba(255, 255, 255, 0.05);
}

/* ===== GLOBAL STYLES ===== */
* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--text-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  color: var(--color-on-surface);
  background-color: var(--color-surface);
  transition: background-color var(--transition-base), color var(--transition-base);
}

/* ===== RESPONSIVE TYPOGRAPHY ===== */
@media (max-width: 768px) {
  :root {
    --text-5xl: 2.25rem;
    --text-4xl: 1.875rem;
    --text-3xl: 1.5rem;
    --text-2xl: 1.25rem;
  }
}

/* ===== UTILITY: TEXT OVERFLOW ===== */
.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.line-clamp-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===== UTILITY: VISIBILITY ===== */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ===== UTILITY: SCROLLBAR STYLING ===== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-surface-variant);
}

::-webkit-scrollbar-thumb {
  background: var(--color-outline);
  border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary);
}

/* Firefox */
* {
  scrollbar-color: var(--color-outline) var(--color-surface-variant);
  scrollbar-width: thin;
}