/* ============================================================
   VyaparOS — Design System & CSS Custom Properties
   main.css
   ============================================================ */

/* ── Google Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800;900&family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body { font-family: var(--font-body); background: var(--bg-base); color: var(--text-primary); line-height: 1.6; overflow-x: hidden; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
ul, ol { list-style: none; }
input, textarea, select { font-family: inherit; }

/* ── CSS Custom Properties ── */
:root {
  /* Brand Colors — VyaparOS Official Palette */
  --blue-50:  #EEF5FF;
  --blue-100: #DCEBFF;
  --blue-200: #B9D7FF;
  --blue-400: #5CA1FE;
  --blue-500: #2D83FD;
  --blue-600: #0D6EFD;
  --blue-700: #0A58CA;
  --blue-800: #084298;
  --blue-900: #0A1D39;
  --blue-950: #050F1F;

  --amber-50:  #FFF8E6;
  --amber-100: #FFEDB3;
  --amber-200: #FFD966;
  --amber-400: #FFBB33;
  --amber-500: #FF9F00;
  --amber-600: #CC7F00;
  --amber-700: #995F00;

  /* Semantic Colors */
  --primary:        #0D6EFD;
  --primary-dark:   #0A58CA;
  --primary-light:  #5CA1FE;
  --accent:         #FF9F00;
  --accent-dark:    #CC7F00;
  --accent-light:   #FFBB33;
  --navy:           #0A1D39;

  --success:  #10B981;
  --warning:  #FF9F00;
  --danger:   #EF4444;
  --info:     #06B6D4;

  /* Backgrounds */
  --bg-base:      #F8FAFF;
  --bg-white:     #FFFFFF;
  --bg-subtle:    #F0F4FF;
  --bg-muted:     #E0EAFF;
  --bg-dark:      #0A1D39;
  --bg-dark-card: #0F2548;
  --bg-dark-mid:  #132040;

  /* Text */
  --text-primary:   #0A1D39;
  --text-secondary: #3D5170;
  --text-muted:     #7A8CA8;
  --text-inverse:   #FFFFFF;
  --text-blue:      #0D6EFD;
  --text-amber:     #FF9F00;

  /* Borders */
  --border:       #D5E2FF;
  --border-light: #EEF5FF;
  --border-dark:  #1A3158;

  /* Shadows */
  --shadow-xs:  0 1px 2px rgba(10,29,57,0.06);
  --shadow-sm:  0 1px 3px rgba(10,29,57,0.12), 0 1px 2px rgba(10,29,57,0.08);
  --shadow-md:  0 4px 6px rgba(10,29,57,0.08), 0 2px 4px rgba(10,29,57,0.06);
  --shadow-lg:  0 10px 15px rgba(10,29,57,0.10), 0 4px 6px rgba(10,29,57,0.05);
  --shadow-xl:  0 20px 25px rgba(10,29,57,0.10), 0 10px 10px rgba(10,29,57,0.04);
  --shadow-2xl: 0 25px 50px rgba(10,29,57,0.25);
  --shadow-blue: 0 8px 32px rgba(13,110,253,0.22);
  --shadow-amber: 0 8px 32px rgba(255,159,0,0.28);
  --shadow-glow-blue: 0 0 40px rgba(13,110,253,0.18);
  --shadow-glow-amber: 0 0 30px rgba(255,159,0,0.22);

  /* Typography */
  --font-display: 'Poppins', 'Inter', system-ui, sans-serif;
  --font-body:    'Inter', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', 'Fira Code', monospace;

  /* Type 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 */
  --text-7xl:  4.5rem;     /* 72px */

  /* 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;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius:    0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-2xl: 2rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition:        250ms ease;
  --transition-slow:   400ms ease;
  --transition-spring: 350ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Layout */
  --container-sm:  640px;
  --container-md:  768px;
  --container-lg:  1024px;
  --container-xl:  1280px;
  --container-2xl: 1440px;
  --section-py:    6rem;
}

/* ── Container ── */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin-inline: auto;
  padding-inline: var(--space-6);
}
.container-lg  { max-width: var(--container-lg); }
.container-2xl { max-width: var(--container-2xl); }

@media (max-width: 768px) {
  .container { padding-inline: var(--space-4); }
  :root { --section-py: 4rem; }
}

/* ── Section ── */
.section { padding-block: var(--section-py); }
.section-dark  { background: var(--bg-dark); }
.section-subtle { background: var(--bg-subtle); }
.section-white { background: var(--bg-white); }

/* ── Typography ── */
h1, h2, h3, h4, h5, h6 { font-family: var(--font-display); font-weight: 700; line-height: 1.2; color: var(--text-primary); }

.display-1 { font-size: clamp(2.5rem, 6vw, 5rem); font-weight: 800; letter-spacing: -0.03em; line-height: 1.05; }
.display-2 { font-size: clamp(2rem, 4.5vw, 3.75rem); font-weight: 800; letter-spacing: -0.025em; line-height: 1.1; }
.h1 { font-size: clamp(1.75rem, 3.5vw, 3rem); font-weight: 700; letter-spacing: -0.02em; }
.h2 { font-size: clamp(1.5rem, 3vw, 2.5rem); font-weight: 700; letter-spacing: -0.02em; }
.h3 { font-size: clamp(1.25rem, 2.5vw, 2rem); font-weight: 600; letter-spacing: -0.015em; }
.h4 { font-size: clamp(1.125rem, 2vw, 1.5rem); font-weight: 600; }
.h5 { font-size: 1.125rem; font-weight: 600; }

.lead { font-size: clamp(1rem, 2vw, 1.25rem); line-height: 1.7; color: var(--text-secondary); font-weight: 400; }
.text-sm  { font-size: var(--text-sm); }
.text-xs  { font-size: var(--text-xs); }
.text-mono { font-family: var(--font-mono); font-size: var(--text-sm); }

/* Gradient Text */
.gradient-text {
  background: linear-gradient(135deg, var(--primary) 0%, #4F46E5 50%, var(--primary-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.gradient-text-amber {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.gradient-text-hero {
  background: linear-gradient(135deg, #FFFFFF 0%, #BFDBFE 50%, #93C5FD 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Section Labels */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
  background: var(--blue-50);
  border: 1px solid var(--blue-100);
  border-radius: var(--radius-full);
  padding: var(--space-1) var(--space-3);
  margin-bottom: var(--space-4);
}
.section-label.amber {
  color: var(--accent-dark);
  background: var(--amber-50);
  border-color: var(--amber-200);
}
.section-label.dark {
  color: var(--blue-400);
  background: rgba(30,107,255,0.12);
  border-color: rgba(30,107,255,0.25);
}
.section-label .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  animation: pulse-dot 2s ease infinite;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-sm);
  letter-spacing: 0.01em;
  border-radius: var(--radius);
  padding: 0.75rem 1.5rem;
  transition: all var(--transition);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}
.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: background var(--transition-fast);
}
.btn:hover::before { background: rgba(255,255,255,0.08); }

.btn-primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 4px 14px rgba(30,107,255,0.35);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(30,107,255,0.45);
}
.btn-primary:active { transform: translateY(0); }

.btn-accent {
  background: var(--accent);
  color: white;
  box-shadow: 0 4px 14px rgba(245,158,11,0.35);
}
.btn-accent:hover {
  background: var(--accent-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(245,158,11,0.45);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}
.btn-outline:hover {
  background: var(--blue-50);
  transform: translateY(-1px);
}

.btn-outline-white {
  background: transparent;
  color: white;
  border: 1.5px solid rgba(255,255,255,0.35);
}
.btn-outline-white:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.6);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  padding-inline: var(--space-3);
}
.btn-ghost:hover { color: var(--primary); background: var(--blue-50); }

.btn-lg { padding: 1rem 2rem; font-size: var(--text-base); border-radius: var(--radius-md); }
.btn-sm { padding: 0.5rem 1rem; font-size: var(--text-xs); }

/* Icon in button */
.btn .icon { width: 16px; height: 16px; transition: transform var(--transition-fast); }
.btn:hover .icon-arrow { transform: translateX(2px); }

/* ── Cards ── */
.card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}
.card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-2px);
  border-color: var(--blue-200);
}

.card-glass {
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,0.5);
  border-radius: var(--radius-xl);
  box-shadow: 0 8px 32px rgba(0,0,0,0.08);
}

.card-dark {
  background: var(--bg-dark-card);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
}
.card-dark:hover {
  border-color: rgba(30,107,255,0.3);
  box-shadow: var(--shadow-glow-blue);
}

/* ── Badge ── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
}
.badge-blue  { background: var(--blue-100); color: var(--blue-700); }
.badge-amber { background: var(--amber-100); color: var(--amber-700); }
.badge-green { background: #D1FAE5; color: #065F46; }
.badge-dark  { background: rgba(30,107,255,0.15); color: var(--blue-400); }
.badge-now   { background: rgba(16,185,129,0.15); color: #10B981; }
.badge-future { background: rgba(245,158,11,0.15); color: var(--accent); }

/* ── Grid Utilities ── */
.grid { display: grid; }
.grid-2 { grid-template-columns: repeat(2, 1fr); gap: var(--space-8); }
.grid-3 { grid-template-columns: repeat(3, 1fr); gap: var(--space-8); }
.grid-4 { grid-template-columns: repeat(4, 1fr); gap: var(--space-6); }
.flex  { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ── Divider ── */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  margin-block: var(--space-8);
}

/* ── Icon Box ── */
.icon-box {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: var(--radius-lg);
  background: var(--blue-50);
  color: var(--primary);
  border: 1px solid var(--blue-100);
  flex-shrink: 0;
  transition: all var(--transition);
}
.icon-box svg { width: 24px; height: 24px; }
.icon-box.amber { background: var(--amber-50); color: var(--accent-dark); border-color: var(--amber-100); }
.icon-box.dark-blue { background: rgba(30,107,255,0.12); color: var(--blue-400); border-color: rgba(30,107,255,0.2); }
.icon-box.lg { width: 64px; height: 64px; border-radius: var(--radius-xl); }
.icon-box.lg svg { width: 30px; height: 30px; }

/* ── Indian Rupee Icon Glyph ── */
.rupee-glyph {
  font-family: var(--font-display), 'Inter', sans-serif;
  font-size: 1.5rem;
  font-weight: 800;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: inherit;
  user-select: none;
}
.icon-box.lg .rupee-glyph { font-size: 1.85rem; }
.sol-pillar-icon .rupee-glyph { font-size: 1.6rem; color: #ffffff; }
.module-card-icon .rupee-glyph { font-size: 1.5rem; }

/* ── Scroll reveal states ── */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-left { opacity: 0; transform: translateX(-32px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal-left.visible { opacity: 1; transform: translateX(0); }
.reveal-right { opacity: 0; transform: translateX(32px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal-right.visible { opacity: 1; transform: translateX(0); }
.reveal-scale { opacity: 0; transform: scale(0.94); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal-scale.visible { opacity: 1; transform: scale(1); }

/* Stagger delays */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }
.delay-6 { transition-delay: 0.6s; }

/* ── Tag/Chip ── */
.tag {
  display: inline-flex;
  align-items: center;
  font-size: var(--text-xs);
  font-weight: 500;
  padding: 0.25rem 0.625rem;
  border-radius: var(--radius-full);
  background: var(--bg-subtle);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

/* ── Number/Stat ── */
.stat-number {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 4vw, 3.5rem);
  letter-spacing: -0.03em;
  color: var(--primary);
  line-height: 1;
}
.stat-number.amber { color: var(--accent); }

/* ── Gradient Backgrounds ── */
.bg-gradient-hero {
  background: linear-gradient(135deg, var(--bg-dark) 0%, #0C1A4E 50%, #0A0E1A 100%);
}
.bg-gradient-blue {
  background: linear-gradient(135deg, var(--blue-600) 0%, var(--blue-700) 100%);
}
.bg-gradient-subtle {
  background: linear-gradient(180deg, var(--bg-white) 0%, var(--bg-subtle) 100%);
}

/* ── Glow Effects ── */
.glow-blue {
  box-shadow: 0 0 0 1px rgba(30,107,255,0.2), 0 8px 32px rgba(30,107,255,0.15);
}
.glow-amber {
  box-shadow: 0 0 0 1px rgba(245,158,11,0.2), 0 8px 32px rgba(245,158,11,0.15);
}

/* ── Text utilities ── */
.text-center { text-align: center; }
.text-left   { text-align: left; }
.text-white  { color: white; }
.text-primary-color { color: var(--primary); }
.text-accent-color  { color: var(--accent); }
.text-secondary-color { color: var(--text-secondary); }
.text-muted-color     { color: var(--text-muted); }
.font-display { font-family: var(--font-display); }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

/* ── Misc ── */
.max-w-prose { max-width: 65ch; margin-inline: auto; }
.max-w-md { max-width: 42rem; margin-inline: auto; }
.mb-4  { margin-bottom: var(--space-4); }
.mb-6  { margin-bottom: var(--space-6); }
.mb-8  { margin-bottom: var(--space-8); }
.mb-12 { margin-bottom: var(--space-12); }
.mb-16 { margin-bottom: var(--space-16); }
.mt-4  { margin-top: var(--space-4); }
.mt-6  { margin-top: var(--space-6); }
.mt-8  { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }

/* ── Noise texture overlay ── */
.noise::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  opacity: 0.4;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--blue-200); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary); }

/* ── Selection ── */
::selection { background: rgba(30,107,255,0.15); color: var(--text-primary); }