/* ────────────────────────────────────────────────────────────────────────
   Celestial Morning — Design System
   Single source of truth for tokens, typography, and base components.
   See DESIGN.md for the full spec.
   ──────────────────────────────────────────────────────────────────────── */

:root {
  /* ── Surfaces ──────────────────────────────────────────────────────── */
  --surface:                   #fbf9f6;
  --surface-dim:               #dbdad7;
  --surface-bright:            #fbf9f6;
  --surface-container-lowest:  #ffffff;
  --surface-container-low:     #f5f3f0;
  --surface-container:         #efeeeb;
  --surface-container-high:    #eae8e5;
  --surface-container-highest: #e4e2df;

  /* ── Ink ───────────────────────────────────────────────────────────── */
  --on-surface:          #1b1c1a;
  --on-surface-variant:  #55423e;
  --inverse-surface:     #30312f;
  --inverse-on-surface:  #f2f0ed;

  /* ── Outlines ──────────────────────────────────────────────────────── */
  --outline:         #88726d;
  --outline-variant: #dbc1ba;

  /* ── Primary — Sacred Saffron ──────────────────────────────────────── */
  --primary:               #9a442d;
  --on-primary:            #ffffff;
  --primary-container:     #e07a5f;
  --on-primary-container:  #5b1604;
  --primary-fixed:         #ffdbd2;
  --primary-fixed-dim:     #ffb4a1;
  --inverse-primary:       #ffb4a1;
  --primary-hover:         #7c2e19;
  --primary-soft:          #fbf1ea;

  /* ── Secondary — Muted Indigo ──────────────────────────────────────── */
  --secondary:               #535f72;
  --on-secondary:            #ffffff;
  --secondary-container:     #d7e3fa;
  --on-secondary-container:  #596578;

  /* ── Tertiary — Quiet Teal ─────────────────────────────────────────── */
  --tertiary:               #006b5b;
  --on-tertiary:            #ffffff;
  --tertiary-container:     #19a992;
  --on-tertiary-container:  #00362d;

  /* ── States ────────────────────────────────────────────────────────── */
  --error:               #ba1a1a;
  --on-error:            #ffffff;
  --error-container:     #ffdad6;
  --on-error-container:  #93000a;
  --success:             #006b5b;

  /* ── Decorative gold (hairlines only) ──────────────────────────────── */
  --gold:                #b8946a;
  --gold-deep:           #8b6914;

  /* ── Shadows (ethereal, diffuse) ───────────────────────────────────── */
  --shadow-xs: 0 1px 2px rgba(83, 95, 114, 0.04);
  --shadow-sm: 0 2px 8px rgba(83, 95, 114, 0.06);
  --shadow-md: 0 4px 20px rgba(83, 95, 114, 0.08);
  --shadow-lg: 0 12px 40px rgba(83, 95, 114, 0.10);
  --shadow-hover: 0 8px 32px rgba(154, 68, 45, 0.12);

  /* ── Spacing (8px scale) ───────────────────────────────────────────── */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 24px;
  --sp-6: 32px;
  --sp-7: 48px;
  --sp-8: 64px;
  --sp-9: 80px;
  --sp-10: 120px;

  /* ── Radii ─────────────────────────────────────────────────────────── */
  --r-sm:   8px;
  --r-md:   16px;
  --r-lg:   24px;
  --r-xl:   48px;
  --r-pill: 9999px;

  /* ── Layout ────────────────────────────────────────────────────────── */
  --container-max:    1280px;
  --gutter-desktop:   64px;
  --gutter-mobile:    20px;

  /* ── Typography stacks ─────────────────────────────────────────────── */
  --font-serif: 'Libre Caslon Text', 'Cormorant Garamond', Georgia, serif;
  --font-sans:  'Hanken Grotesk', 'Inter', system-ui, -apple-system, sans-serif;
  --font-deva:  'Tiro Devanagari Sanskrit', serif;
}

/* ──────────────────────────────────────────────────────────────────────
   Reset / base
   ────────────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--on-surface);
  background: var(--surface);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  /* Remove the blue tap-flash on iOS Safari */
  -webkit-tap-highlight-color: transparent;
}

/* Prevent zoom-on-focus for inputs on iOS (font-size must be ≥16px) */
@media (max-width: 768px) {
  input, textarea, select { font-size: 16px; }
}

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

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

/* ──────────────────────────────────────────────────────────────────────
   Typography (matches DESIGN.md tokens)
   ────────────────────────────────────────────────────────────────────── */
.serif { font-family: var(--font-serif); }
.devanagari { font-family: var(--font-deva); }

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--on-surface);
  margin: 0;
}

.display-lg {
  font-family: var(--font-serif);
  font-size: 48px;
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
}
.headline-md {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 400;
  line-height: 1.3;
}
.headline-sm {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 400;
  line-height: 1.4;
}
.body-lg {
  font-family: var(--font-sans);
  font-size: 18px;
  line-height: 1.6;
}
.body-md {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
}
.label-md {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
}

@media (max-width: 640px) {
  .display-lg { font-size: 36px; line-height: 1.2; letter-spacing: -0.01em; }
  .headline-md { font-size: 26px; }
  .headline-sm { font-size: 22px; }
}

/* ──────────────────────────────────────────────────────────────────────
   Buttons — pill-shaped
   ────────────────────────────────────────────────────────────────────── */
.btn,
button.btn-primary,
button.btn-secondary,
button.btn-ghost {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  border: none;
  cursor: pointer;
  border-radius: var(--r-pill);
  padding: 12px 24px;
  line-height: 1.2;
  transition: background 0.18s ease, color 0.18s ease,
              border-color 0.18s ease, box-shadow 0.18s ease, transform 0.12s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  white-space: nowrap;
}
.btn:disabled,
button:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary {
  background: var(--primary-container);
  color: var(--on-primary);
}
.btn-primary:hover:not(:disabled) {
  background: var(--primary);
  box-shadow: var(--shadow-hover);
}

.btn-secondary {
  background: transparent;
  color: var(--secondary);
  border: 1px solid var(--secondary);
}
.btn-secondary:hover:not(:disabled) {
  background: var(--secondary);
  color: var(--on-secondary);
}

.btn-ghost {
  background: transparent;
  color: var(--on-surface-variant);
  border: 1px solid var(--outline-variant);
}
.btn-ghost:hover:not(:disabled) {
  border-color: var(--outline);
  color: var(--on-surface);
}

.btn-link {
  background: transparent;
  color: var(--primary);
  padding: 4px 8px;
  border: none;
  font-weight: 500;
}
.btn-link:hover { color: var(--primary-hover); text-decoration: underline; }

.btn-lg { padding: 16px 32px; font-size: 15px; }
.btn-sm { padding: 8px 16px; font-size: 13px; }

/* ──────────────────────────────────────────────────────────────────────
   Inputs — soft fill, indigo border
   ────────────────────────────────────────────────────────────────────── */
input, textarea, select {
  font-family: var(--font-sans);
  font-size: 15px;
  background: var(--surface-container-low);
  border: 1px solid var(--outline-variant);
  border-radius: var(--r-pill);
  padding: 12px 18px;
  color: var(--on-surface);
  width: 100%;
  transition: border-color 0.15s, box-shadow 0.15s, background 0.15s;
}
textarea {
  border-radius: var(--r-md);
  padding: 14px 18px;
  resize: vertical;
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  background: var(--surface-container-lowest);
  box-shadow: 0 0 0 4px var(--primary-soft);
}
input::placeholder, textarea::placeholder { color: var(--outline); }

label {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
  display: block;
  margin-bottom: var(--sp-2);
}

/* ──────────────────────────────────────────────────────────────────────
   Cards
   ────────────────────────────────────────────────────────────────────── */
.card {
  background: var(--surface-container-lowest);
  border: 1px solid color-mix(in srgb, var(--secondary) 12%, transparent);
  border-radius: var(--r-lg);
  padding: var(--sp-6);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.card-hover:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

/* ──────────────────────────────────────────────────────────────────────
   Chips
   ────────────────────────────────────────────────────────────────────── */
.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  background: var(--secondary-container);
  color: var(--on-secondary-container);
  border-radius: var(--r-pill);
  padding: 4px 12px;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.03em;
}
.chip.success { background: color-mix(in srgb, var(--tertiary-container) 30%, transparent); color: var(--tertiary); }
.chip.error   { background: var(--error-container); color: var(--on-error-container); }
.chip.muted   { background: var(--surface-container-high); color: var(--on-surface-variant); }

/* ──────────────────────────────────────────────────────────────────────
   Layout helpers
   ────────────────────────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--gutter-desktop);
  padding-right: var(--gutter-desktop);
}
@media (max-width: 768px) {
  .container { padding-left: var(--gutter-mobile); padding-right: var(--gutter-mobile); }
}

.section { padding: var(--sp-9) 0; }
.section-lg { padding: var(--sp-10) 0; }
@media (max-width: 768px) {
  .section { padding: var(--sp-7) 0; }
  .section-lg { padding: var(--sp-9) 0; }
}

/* ──────────────────────────────────────────────────────────────────────
   Ornament — decorative gold hairline
   ────────────────────────────────────────────────────────────────────── */
.ornament {
  display: flex; align-items: center; gap: 12px;
  color: var(--gold);
}
.ornament::before, .ornament::after {
  content: ""; flex: 1; height: 1px; background: var(--gold);
  opacity: 0.45;
}

/* ──────────────────────────────────────────────────────────────────────
   Nav — top bar with mobile hamburger
   ────────────────────────────────────────────────────────────────────── */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-5) var(--gutter-desktop);
  max-width: var(--container-max);
  margin: 0 auto;
  gap: var(--sp-3);
}
.nav .brand {
  display: flex; align-items: center; gap: var(--sp-3);
  font-family: var(--font-serif);
  font-size: 22px;
  color: var(--on-surface);
  text-decoration: none;
  flex-shrink: 0;
}
.nav .brand:hover { color: var(--on-surface); }
.nav .brand .om-glyph {
  font-family: var(--font-deva);
  color: var(--primary);
  font-size: 26px;
  line-height: 1;
}

/* Desktop links container (NOT named .links to avoid specificity clashes) */
.nav-desktop-links {
  display: flex;
  gap: var(--sp-2);
  align-items: center;
}
.nav-desktop-links a {
  color: var(--on-surface-variant);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: var(--r-pill);
  transition: background 0.15s, color 0.15s;
  text-decoration: none;
}
.nav-desktop-links a:hover { background: var(--surface-container); color: var(--on-surface); }
.nav-desktop-links a.active { color: var(--primary); }

/* Hamburger (mobile only). 44px min size = comfortable tap target. */
.nav-hamburger {
  display: none;
  background: var(--surface-container-lowest);
  border: 1px solid var(--outline-variant);
  border-radius: var(--r-pill);
  width: 44px;
  height: 44px;
  padding: 0;
  color: var(--on-surface);
  cursor: pointer;
  line-height: 0;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.15s, border-color 0.15s, transform 0.1s;
}
.nav-hamburger:hover  { background: var(--surface-container); }
.nav-hamburger:active { transform: scale(0.94); }
body.nav-open .nav-hamburger {
  background: var(--primary-soft);
  border-color: color-mix(in srgb, var(--primary) 30%, var(--outline-variant));
}

/* Mobile slide-down panel */
.nav-mobile-panel {
  display: none;
  flex-direction: column;
  gap: 2px;
  padding: var(--sp-3) var(--gutter-mobile) var(--sp-5);
  border-bottom: 1px solid var(--outline-variant);
  background: var(--surface);
  animation: navSlide 0.18s ease-out;
}
@keyframes navSlide {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}
.nav-mobile-panel a {
  display: block;
  padding: 14px 16px;
  border-radius: var(--r-md);
  color: var(--on-surface);
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 500;
  text-decoration: none;
}
.nav-mobile-panel a:hover { background: var(--surface-container); }
.nav-mobile-panel a.active { color: var(--primary); background: var(--primary-soft); }
.nav-mobile-cta { margin-top: var(--sp-3); padding: 0 16px; }
.nav-mobile-cta .btn { width: 100%; padding: 14px 24px; }

/* Switch to hamburger early enough that tablets in portrait (768px)
   also get the cleaner mobile nav, since the desktop link row gets
   cramped well before phone-only sizes. */
@media (max-width: 900px) {
  .nav { padding: var(--sp-3) var(--gutter-mobile); }
  .nav .brand { font-size: 18px; }
  .nav .brand .om-glyph { font-size: 22px; }
  .nav-desktop-links { display: none !important; }
  .nav-hamburger { display: inline-flex !important; }
  body.nav-open .nav-mobile-panel { display: flex !important; }
}

/* ──────────────────────────────────────────────────────────────────────
   Utilities
   ────────────────────────────────────────────────────────────────────── */
.text-muted { color: var(--on-surface-variant); }
.text-faint { color: var(--outline); }
.text-center { text-align: center; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--sp-2); }
.gap-3 { gap: var(--sp-3); }
.gap-4 { gap: var(--sp-4); }
.gap-5 { gap: var(--sp-5); }
.gap-6 { gap: var(--sp-6); }
.mt-4 { margin-top: var(--sp-4); }
.mt-5 { margin-top: var(--sp-5); }
.mt-6 { margin-top: var(--sp-6); }
.mt-7 { margin-top: var(--sp-7); }
.mb-4 { margin-bottom: var(--sp-4); }
.mb-5 { margin-bottom: var(--sp-5); }
.mb-6 { margin-bottom: var(--sp-6); }

.hide-mobile { display: initial; }
.show-mobile { display: none; }
@media (max-width: 640px) {
  .hide-mobile { display: none; }
  .show-mobile { display: initial; }
}