/* ============================================
   TrackFlow — Global Design System
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  --text-xs: 0.75rem;
  --text-sm: 0.8125rem;
  --text-base: 0.875rem;
  --text-md: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;

  --weight-light: 300;
  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;
  --weight-extrabold: 800;

  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.75;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.25rem;
  --radius-full: 9999px;

  /* Shadows */
  --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 -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);

  /* Z-Index */
  --z-dropdown: 50;
  --z-sticky: 100;
  --z-modal-backdrop: 200;
  --z-modal: 300;
  --z-tooltip: 400;
  --z-toast: 500;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Layout */
  --sidebar-width: 260px;
  --sidebar-collapsed-width: 72px;
  --topbar-height: 64px;
  --content-max-width: 1400px;
}

/* ---------- Dark Theme (Default) ---------- */
[data-theme="dark"] {
  color-scheme: dark;
  --form-color-scheme: dark;
  --bg-primary: #0a0a0f;
  --bg-secondary: #111118;
  --bg-tertiary: #1a1a24;
  --bg-elevated: #1e1e2a;
  --bg-surface: rgba(30, 30, 46, 0.6);
  --bg-hover: rgba(99, 102, 241, 0.08);
  --bg-active: rgba(99, 102, 241, 0.12);

  --border-primary: rgba(255, 255, 255, 0.08);
  --border-secondary: rgba(255, 255, 255, 0.05);
  --border-hover: rgba(99, 102, 241, 0.3);
  --border-focus: rgba(99, 102, 241, 0.5);

  --text-primary: #f0f0f5;
  --text-secondary: #a0a0b8;
  --text-tertiary: #6b6b80;
  --text-inverse: #0a0a0f;

  --accent-primary: #6366f1;
  --accent-primary-hover: #7577f5;
  --accent-secondary: #06b6d4;
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #06b6d4 100%);
  --accent-gradient-hover: linear-gradient(135deg, #7577f5 0%, #22d3ee 100%);
  --accent-subtle: rgba(99, 102, 241, 0.1);

  --success: #22c55e;
  --success-bg: rgba(34, 197, 94, 0.1);
  --success-border: rgba(34, 197, 94, 0.2);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.1);
  --warning-border: rgba(245, 158, 11, 0.2);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.1);
  --danger-border: rgba(239, 68, 68, 0.2);
  --info: #3b82f6;
  --info-bg: rgba(59, 130, 246, 0.1);
  --info-border: rgba(59, 130, 246, 0.2);

  --glass-bg: rgba(20, 20, 30, 0.7);
  --glass-border: rgba(255, 255, 255, 0.06);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);

  --scrollbar-track: #111118;
  --scrollbar-thumb: #2a2a3a;
  --scrollbar-thumb-hover: #3a3a4a;

  --chart-1: #6366f1;
  --chart-2: #06b6d4;
  --chart-3: #8b5cf6;
  --chart-4: #22c55e;
  --chart-5: #f59e0b;
  --chart-6: #ec4899;
}

/* ---------- Light Theme ---------- */
[data-theme="light"] {
  color-scheme: light;
  --form-color-scheme: light;
  --bg-primary: #f8f9fc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f3f8;
  --bg-elevated: #ffffff;
  --bg-surface: rgba(255, 255, 255, 0.8);
  --bg-hover: rgba(99, 102, 241, 0.05);
  --bg-active: rgba(99, 102, 241, 0.08);

  --border-primary: rgba(0, 0, 0, 0.1);
  --border-secondary: rgba(0, 0, 0, 0.06);
  --border-hover: rgba(99, 102, 241, 0.3);
  --border-focus: rgba(99, 102, 241, 0.5);

  --text-primary: #111827;
  --text-secondary: #6b7280;
  --text-tertiary: #9ca3af;
  --text-inverse: #ffffff;

  --accent-primary: #4f46e5;
  --accent-primary-hover: #4338ca;
  --accent-secondary: #0891b2;
  --accent-gradient: linear-gradient(135deg, #4f46e5 0%, #0891b2 100%);
  --accent-gradient-hover: linear-gradient(135deg, #4338ca 0%, #0e7490 100%);
  --accent-subtle: rgba(79, 70, 229, 0.08);

  --success: #16a34a;
  --success-bg: rgba(22, 163, 74, 0.08);
  --success-border: rgba(22, 163, 74, 0.2);
  --warning: #d97706;
  --warning-bg: rgba(217, 119, 6, 0.08);
  --warning-border: rgba(217, 119, 6, 0.2);
  --danger: #dc2626;
  --danger-bg: rgba(220, 38, 38, 0.08);
  --danger-border: rgba(220, 38, 38, 0.2);
  --info: #2563eb;
  --info-bg: rgba(37, 99, 235, 0.08);
  --info-border: rgba(37, 99, 235, 0.2);

  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(0, 0, 0, 0.08);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);

  --scrollbar-track: #f1f3f8;
  --scrollbar-thumb: #d1d5db;
  --scrollbar-thumb-hover: #9ca3af;

  --chart-1: #4f46e5;
  --chart-2: #0891b2;
  --chart-3: #7c3aed;
  --chart-4: #16a34a;
  --chart-5: #d97706;
  --chart-6: #db2777;
}

/* ---------- CSS Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow: hidden;
  min-height: 100vh;
}

a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover {
  color: var(--accent-primary-hover);
}

button {
  cursor: pointer;
  font-family: inherit;
  font-size: inherit;
  border: none;
  background: none;
  color: inherit;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  outline: none;
}

img, svg {
  display: block;
  max-width: 100%;
}

ul, ol {
  list-style: none;
}

table {
  border-collapse: collapse;
  width: 100%;
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
}
::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover);
}

/* ---------- Selection ---------- */
::selection {
  background: var(--accent-primary);
  color: var(--text-inverse);
}

/* ---------- Focus Ring ---------- */
:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ---------- Typography Utilities ---------- */
.text-gradient {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--weight-semibold);
  line-height: var(--leading-tight);
  color: var(--text-primary);
}