/* ==========================================
   GSSS JETHANTRI - MODERN DESIGN SYSTEM
   Inspired by SaveMyExams.com - Built Better
   Educational Platform · Clean · Professional
   ========================================== */

/* Modern Educational Typography */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=Inter:wght@400;500;600;700&family=Noto+Sans+Devanagari:wght@400;500;600;700&display=swap');

/* ==========================================
   DESIGN TOKENS
   ========================================== */

:root {
  /* ===== TYPOGRAPHY SYSTEM ===== */

  /* Font Families */
  --font-primary: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-secondary: 'Inter', -apple-system, sans-serif;
  --font-hindi: 'Noto Sans Devanagari', sans-serif;

  /* Font Sizes - Fluid Typography Scale */
  --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 */
  --text-6xl: 3.75rem;      /* 60px */

  /* Font Weights */
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;

  /* Line Heights */
  --leading-none: 1;
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  --leading-loose: 2;

  /* ===== COLOR SYSTEM - LIGHT MODE (DEFAULT) ===== */

  /* Brand Colors */
  --color-primary: #2563eb;        /* Blue 600 - Trust, Education */
  --color-primary-50: #eff6ff;
  --color-primary-100: #dbeafe;
  --color-primary-200: #bfdbfe;
  --color-primary-600: #2563eb;
  --color-primary-700: #1d4ed8;
  --color-primary-800: #1e40af;

  --color-secondary: #06b6d4;      /* Cyan 500 - Fresh, Modern */
  --color-secondary-50: #ecfeff;
  --color-secondary-100: #cffafe;
  --color-secondary-500: #06b6d4;
  --color-secondary-600: #0891b2;
  --color-secondary-700: #0e7490;

  --color-accent: #8b5cf6;         /* Purple 500 - Creative */
  --color-accent-50: #faf5ff;
  --color-accent-100: #f3e8ff;
  --color-accent-500: #8b5cf6;
  --color-accent-600: #7c3aed;

  /* Semantic Colors */
  --color-success: #10b981;        /* Green 500 */
  --color-success-50: #f0fdf4;
  --color-success-100: #dcfce7;
  --color-success-500: #10b981;

  --color-warning: #f59e0b;        /* Amber 500 */
  --color-warning-50: #fffbeb;
  --color-warning-100: #fef3c7;
  --color-warning-500: #f59e0b;

  --color-danger: #ef4444;         /* Red 500 */
  --color-danger-50: #fef2f2;
  --color-danger-100: #fee2e2;
  --color-danger-500: #ef4444;

  --color-info: #3b82f6;           /* Blue 500 */
  --color-info-50: #eff6ff;
  --color-info-100: #dbeafe;
  --color-info-500: #3b82f6;

  /* Neutral Grays */
  --color-white: #ffffff;
  --color-black: #000000;
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;

  /* Subject-Specific Colors */
  --color-history: #dc2626;        /* Red 600 */
  --color-history-light: #fef2f2;
  --color-polsci: #ea580c;         /* Orange 600 */
  --color-polsci-light: #fff7ed;
  --color-hindi: #7c3aed;          /* Purple 600 */
  --color-hindi-light: #faf5ff;
  --color-english: #059669;        /* Emerald 600 */
  --color-english-light: #f0fdf4;

  /* Background Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-tertiary: #f3f4f6;
  --bg-overlay: rgba(0, 0, 0, 0.5);

  /* Text Colors */
  --text-primary: #111827;         /* Gray 900 */
  --text-secondary: #4b5563;       /* Gray 600 */
  --text-tertiary: #9ca3af;        /* Gray 400 */
  --text-inverse: #ffffff;

  /* Border Colors */
  --border-primary: #e5e7eb;       /* Gray 200 */
  --border-secondary: #d1d5db;     /* Gray 300 */
  --border-focus: #2563eb;         /* Primary */

  /* ===== SPACING SYSTEM (4px base unit) ===== */

  --space-0: 0;
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  --space-20: 5rem;     /* 80px */
  --space-24: 6rem;     /* 96px */
  --space-32: 8rem;     /* 128px */

  /* ===== LAYOUT WIDTHS ===== */

  --width-xs: 20rem;      /* 320px */
  --width-sm: 24rem;      /* 384px */
  --width-md: 28rem;      /* 448px */
  --width-lg: 32rem;      /* 512px */
  --width-xl: 36rem;      /* 576px */
  --width-2xl: 42rem;     /* 672px */
  --width-3xl: 48rem;     /* 768px */
  --width-4xl: 56rem;     /* 896px */
  --width-5xl: 64rem;     /* 1024px */
  --width-6xl: 72rem;     /* 1152px */
  --width-7xl: 80rem;     /* 1280px */
  --width-full: 100%;

  /* Container Widths */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1536px;

  /* ===== BORDER RADIUS ===== */

  --radius-none: 0;
  --radius-sm: 0.25rem;    /* 4px */
  --radius-base: 0.5rem;   /* 8px */
  --radius-md: 0.75rem;    /* 12px */
  --radius-lg: 1rem;       /* 16px */
  --radius-xl: 1.5rem;     /* 24px */
  --radius-2xl: 2rem;      /* 32px */
  --radius-full: 9999px;

  /* ===== SHADOWS ===== */

  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
  --shadow-base: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.05);

  /* ===== TRANSITIONS ===== */

  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slower: 500ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Easing Functions */
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);

  /* ===== Z-INDEX SCALE ===== */

  --z-base: 0;
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
}

/* ==========================================
   DARK MODE OVERRIDES
   ========================================== */

[data-theme="dark"] {
  /* Background Colors */
  --bg-primary: #111827;           /* Gray 900 */
  --bg-secondary: #1f2937;         /* Gray 800 */
  --bg-tertiary: #374151;          /* Gray 700 */
  --bg-overlay: rgba(0, 0, 0, 0.7);

  /* Text Colors */
  --text-primary: #f9fafb;         /* Gray 50 */
  --text-secondary: #d1d5db;       /* Gray 300 */
  --text-tertiary: #9ca3af;        /* Gray 400 */
  --text-inverse: #111827;

  /* Border Colors */
  --border-primary: #374151;       /* Gray 700 */
  --border-secondary: #4b5563;     /* Gray 600 */

  /* Adjust Brand Colors for Dark Mode */
  --color-primary: #3b82f6;        /* Slightly lighter blue */
  --color-secondary: #22d3ee;      /* Lighter cyan */
  --color-accent: #a78bfa;         /* Lighter purple */

  /* Subject Colors - Slightly Lighter */
  --color-history: #ef4444;
  --color-polsci: #f97316;
  --color-hindi: #8b5cf6;
  --color-english: #10b981;

  /* Shadows for Dark Mode */
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.4), 0 1px 2px -1px rgba(0, 0, 0, 0.4);
  --shadow-base: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
}

/* ==========================================
   ACCESSIBILITY - REDUCED MOTION
   ========================================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ==========================================
   BASE STYLES
   ========================================== */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

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

/* Hindi Text Styling */
.hindi-text {
  font-family: var(--font-hindi);
  font-weight: var(--font-normal);
}

/* Selection Highlight */
::selection {
  background-color: var(--color-primary-100);
  color: var(--text-primary);
}

::-moz-selection {
  background-color: var(--color-primary-100);
  color: var(--text-primary);
}

/* Focus Styles */
:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}