/* ============================================
   Bus Rentals Bangalore — Design System
   ============================================ */

/* ─── CSS Custom Properties ─── */
:root {
  /* Colors */
  --color-primary: #E87722;
  --color-primary-light: #FFF0E0;
  --color-secondary: #1C1C2E;
  --color-accent: #FFF8F0;
  --color-text: #111118;
  --color-muted: #6B7280;
  --color-whatsapp: #25D366;
  --color-divider: #E5E0D8;
  --color-white: #FFFFFF;
  --color-bg: #FFF8F0;
  --color-bg-alt: #FFFFFF;

  /* Typography */
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'DM Sans', system-ui, sans-serif;
  --font-mono: 'DM Mono', monospace;

  /* Font Sizes (mobile-first, scale up) */
  --text-xs: 0.75rem;      /* 12px */
  --text-sm: 0.8125rem;    /* 13px */
  --text-base: 0.9375rem;  /* 15px */
  --text-lg: 1.0625rem;    /* 17px */
  --text-xl: 1.1875rem;    /* 19px */
  --text-2xl: 1.375rem;    /* 22px */
  --text-3xl: 1.75rem;     /* 28px */
  --text-4xl: 2.125rem;    /* 34px */
  --text-5xl: 2.75rem;     /* 44px */
  --text-6xl: 3.5rem;      /* 56px */

  /* 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;

  /* Layout */
  --max-width: 1280px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --radius-pill: 999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.06), 0 2px 6px rgba(0,0,0,0.04);
  --shadow-lg: 0 20px 50px rgba(0,0,0,0.1), 0 10px 20px rgba(0,0,0,0.04);
  --shadow-card-hover: 0 24px 60px rgba(0,0,0,0.1), 0 12px 24px rgba(0,0,0,0.06);
  --shadow-inner: inset 0 2px 4px rgba(0,0,0,0.03);

  /* Transitions */
  --transition-fast: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Z-index scale */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-drawer: 300;
  --z-modal: 400;
  --z-float: 500;
}

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

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

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg-alt);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  letter-spacing: -0.01em;
}

::selection {
  background-color: var(--color-primary);
  color: var(--color-white);
}

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

input, button, textarea, select {
  font: inherit;
  color: inherit;
  border-radius: var(--radius-sm);
}

input:focus, textarea:focus, select:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(232, 119, 34, 0.15);
  border-color: var(--color-primary);
}

button {
  cursor: pointer;
  border: none;
  background: none;
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

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

/* ─── Typography ─── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }

p {
  margin-bottom: var(--space-4);
  color: var(--color-muted);
  line-height: 1.7;
}

.lead {
  font-size: var(--text-lg);
  line-height: 1.7;
  color: var(--color-muted);
  max-width: 640px;
}

/* ─── Layout Utilities ─── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-5);
  padding-right: var(--space-5);
}

.section {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}

.section-alt {
  background-color: var(--color-bg);
}

.text-center { text-align: center; }
.text-left   { text-align: left; }
.text-right  { text-align: right; }

/* ─── Flex / Grid Utilities ─── */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

.grid { display: grid; }
.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* ─── Animation Utilities ─── */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 700ms cubic-bezier(0.25, 0.46, 0.45, 0.94), transform 700ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.stagger-1 { transition-delay: 80ms; }
.stagger-2 { transition-delay: 160ms; }
.stagger-3 { transition-delay: 240ms; }
.stagger-4 { transition-delay: 320ms; }
.stagger-5 { transition-delay: 400ms; }

/* ─── Scrollbar ─── */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--color-bg);
}
::-webkit-scrollbar-thumb {
  background: var(--color-divider);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-muted);
}

/* ─── Tablet (768px+) ─── */
@media (min-width: 768px) {
  :root {
    --text-3xl: 2.125rem;
    --text-4xl: 2.75rem;
    --text-5xl: 3.5rem;
    --text-6xl: 4.5rem;
  }
  h1 { font-size: var(--text-4xl); }
  h2 { font-size: var(--text-3xl); }

  .container {
    padding-left: var(--space-8);
    padding-right: var(--space-8);
  }

  .section {
    padding-top: var(--space-24);
    padding-bottom: var(--space-24);
  }
}

/* ─── Desktop (1024px+) ─── */
@media (min-width: 1024px) {
  :root {
    --text-4xl: 3.25rem;
    --text-5xl: 4rem;
    --text-6xl: 5rem;
  }
  h1 { font-size: var(--text-5xl); }
  h2 { font-size: var(--text-4xl); }

  .grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
}

/* ─── Large Desktop (1280px+) ─── */
@media (min-width: 1280px) {
  .container {
    padding-left: var(--space-12);
    padding-right: var(--space-12);
  }
}