/* ==========================================================================
   Natko Studio — Design System
   Tokens + base components shared by every page.
   ========================================================================== */

:root {
  /* Color */
  --ivory: #FBF7F0;
  --ivory-deep: #F5EFE4;
  --sandstone: #E7D9C4;
  --champagne: #E8CFA0;
  --champagne-deep: #C9A876;
  --blush: #EFDAD6;
  --sage: #8FA184;
  --sage-deep: #71876A;
  --mocha: #4A3627;
  --mocha-soft: #7A6857;
  --mocha-faint: #B7A794;
  --white: #FFFFFF;
  --error: #B3554A;
  --success: #6E8F63;

  /* Typography */
  --font-serif: 'Cormorant Garamond', Georgia, serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Spacing */
  --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: 96px; --sp-10: 128px;

  /* Radius */
  --radius-sm: 10px; --radius-md: 16px; --radius-lg: 20px; --radius-pill: 999px;

  /* Shadow */
  --shadow-sm: 0 2px 12px rgba(74,54,39,0.08);
  --shadow-md: 0 8px 30px rgba(74,54,39,0.12);
  --shadow-lg: 0 20px 60px rgba(74,54,39,0.18);

  /* Motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur-fast: 220ms;
  --dur-med: 380ms;
  --dur-slow: 700ms;

  /* Layout */
  --container: 1200px;
  --header-h: 84px;
}

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

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--mocha);
  background: var(--ivory);
  -webkit-font-smoothing: antialiased;
  line-height: 1.55;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; font-size: 16px; }

h1, h2, h3, h4 { font-family: var(--font-serif); font-weight: 600; margin: 0 0 var(--sp-3); color: var(--mocha); letter-spacing: 0.2px; }
h1 { font-size: clamp(38px, 5.5vw, 68px); line-height: 1.05; font-weight: 500; }
h2 { font-size: clamp(30px, 3.6vw, 44px); line-height: 1.12; }
h3 { font-size: clamp(22px, 2.4vw, 28px); line-height: 1.2; }
h4 { font-size: 20px; }
p { margin: 0 0 var(--sp-4); color: var(--mocha-soft); }

.eyebrow {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--sage-deep);
  margin-bottom: var(--sp-3);
}

.container { max-width: var(--container); margin: 0 auto; padding: 0 var(--sp-6); }
@media (max-width: 640px) { .container { padding: 0 var(--sp-4); } }

.section { padding: var(--sp-9) 0; }
.section--tight { padding: var(--sp-7) 0; }
.section--tinted { background: var(--ivory-deep); }
@media (max-width: 640px) { .section { padding: var(--sp-8) 0; } }

.section-head { max-width: 640px; margin: 0 auto var(--sp-7); text-align: center; }
.section-head--left { margin: 0 0 var(--sp-7); text-align: left; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: 15px 30px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  transition: transform var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
  white-space: nowrap;
}
.btn:focus-visible { outline: 2px solid var(--mocha); outline-offset: 3px; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--mocha); color: var(--ivory); box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: #3a2b1e; box-shadow: var(--shadow-md); transform: translateY(-1px); }
.btn-secondary { background: transparent; color: var(--mocha); border-color: var(--mocha); }
.btn-secondary:hover { background: var(--mocha); color: var(--ivory); }
.btn-champagne { background: var(--champagne); color: var(--mocha); box-shadow: var(--shadow-sm); }
.btn-champagne:hover { background: var(--champagne-deep); transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--mocha-soft); }
.btn-ghost:hover { color: var(--mocha); }
.btn-sm { padding: 10px 20px; font-size: 13px; }
.btn-lg { padding: 18px 38px; font-size: 16px; }
.btn-block { width: 100%; }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; transform: none !important; }
.btn-loading { position: relative; color: transparent !important; pointer-events: none; }
.btn-loading::after {
  content: ""; position: absolute; width: 16px; height: 16px; border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.4); border-top-color: currentColor;
  animation: spin 0.7s linear infinite; color: var(--ivory);
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Cards */
.card {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur-med) var(--ease), box-shadow var(--dur-med) var(--ease);
}
.card--hover:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }

/* Tags / badges */
.tag {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 14px; border-radius: var(--radius-pill);
  font-size: 12px; font-weight: 600; letter-spacing: 0.4px;
  background: var(--blush); color: var(--mocha);
}
.tag--sage { background: rgba(143,161,132,0.18); color: var(--sage-deep); }
.tag--champagne { background: var(--champagne); color: var(--mocha); }
.tag--outline { background: transparent; border: 1px solid var(--sandstone); color: var(--mocha-soft); }

.badge-status { display: inline-flex; align-items: center; gap: 6px; padding: 4px 12px; border-radius: var(--radius-pill); font-size: 12px; font-weight: 600; }
.badge-status.draft { background: var(--sandstone); color: var(--mocha-soft); }
.badge-status.published { background: rgba(143,161,132,0.2); color: var(--sage-deep); }

/* Forms */
.field { margin-bottom: var(--sp-5); text-align: left; }
.field label { display: block; font-size: 13px; font-weight: 600; margin-bottom: var(--sp-2); color: var(--mocha); }
.field input, .field select, .field textarea {
  width: 100%; padding: 14px 16px; border-radius: var(--radius-sm);
  border: 1.5px solid var(--sandstone); background: var(--white);
  transition: border-color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--sage); box-shadow: 0 0 0 4px rgba(143,161,132,0.15);
}
.field .hint { font-size: 12px; color: var(--mocha-faint); margin-top: 6px; }
.field.has-error input { border-color: var(--error); }
.field .error-msg { font-size: 12px; color: var(--error); margin-top: 6px; display: flex; gap: 4px; align-items: center; }
.field.has-success input { border-color: var(--success); }
.checkbox-row { display: flex; align-items: flex-start; gap: 10px; font-size: 14px; color: var(--mocha-soft); }

/* Nav */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(251,247,240,0.9); backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}
.site-header.is-scrolled { border-color: var(--sandstone); box-shadow: var(--shadow-sm); }
.nav-row { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); }
.logo { font-family: var(--font-serif); font-size: 24px; font-weight: 600; letter-spacing: 0.5px; }
.nav-links { display: flex; gap: var(--sp-6); align-items: center; }
.nav-links a { font-size: 15px; font-weight: 500; color: var(--mocha-soft); transition: color var(--dur-fast); }
.nav-links a:hover, .nav-links a.active { color: var(--mocha); }
.nav-actions { display: flex; align-items: center; gap: var(--sp-3); }
.nav-toggle { display: none; background: none; border: none; padding: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--mocha); margin: 5px 0; transition: transform var(--dur-fast), opacity var(--dur-fast); }

@media (max-width: 900px) {
  .nav-links, .nav-actions .btn-secondary { display: none; }
  .nav-toggle { display: block; }
  .site-header.menu-open .nav-links {
    display: flex; flex-direction: column; align-items: flex-start; gap: var(--sp-4);
    position: absolute; top: var(--header-h); left: 0; right: 0;
    background: var(--ivory); padding: var(--sp-5) var(--sp-6) var(--sp-7);
    border-bottom: 1px solid var(--sandstone); box-shadow: var(--shadow-md);
  }
}

/* Footer */
.site-footer { background: var(--mocha); color: var(--ivory); padding: var(--sp-9) 0 var(--sp-5); }
.site-footer h4 { color: var(--ivory); font-size: 16px; font-family: var(--font-sans); font-weight: 600; }
.site-footer a { color: rgba(251,247,240,0.7); font-size: 14px; }
.site-footer a:hover { color: var(--champagne); }
.footer-grid { display: grid; grid-template-columns: 1.6fr repeat(4, 1fr); gap: var(--sp-6); padding-bottom: var(--sp-8); }
.footer-grid .col ul { display: flex; flex-direction: column; gap: var(--sp-3); margin-top: var(--sp-4); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: var(--sp-5); border-top: 1px solid rgba(251,247,240,0.15); font-size: 13px; color: rgba(251,247,240,0.6); flex-wrap: wrap; gap: var(--sp-3); }
.social-row { display: flex; gap: var(--sp-3); }
.social-row a { width: 36px; height: 36px; border-radius: 50%; border: 1px solid rgba(251,247,240,0.25); display: flex; align-items: center; justify-content: center; }
@media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .footer-grid { grid-template-columns: 1fr; } }

/* Accordion (FAQ) */
.accordion-item { border-bottom: 1px solid var(--sandstone); }
.accordion-trigger {
  width: 100%; display: flex; justify-content: space-between; align-items: center;
  background: none; border: none; padding: var(--sp-5) 0; text-align: left;
  font-family: var(--font-serif); font-size: 19px; font-weight: 600; color: var(--mocha);
}
.accordion-icon { transition: transform var(--dur-fast) var(--ease); font-size: 20px; color: var(--sage-deep); flex-shrink: 0; margin-left: var(--sp-4); }
.accordion-item.open .accordion-icon { transform: rotate(45deg); }
.accordion-panel { max-height: 0; overflow: hidden; transition: max-height var(--dur-med) var(--ease); }
.accordion-item.open .accordion-panel { max-height: 400px; }
.accordion-panel-inner { padding-bottom: var(--sp-5); color: var(--mocha-soft); }

/* Star rating */
.stars { color: var(--champagne-deep); letter-spacing: 2px; font-size: 15px; }

/* Skeleton loading */
.skeleton { background: linear-gradient(90deg, var(--sandstone) 25%, var(--ivory-deep) 37%, var(--sandstone) 63%); background-size: 400% 100%; animation: shimmer 1.4s ease infinite; border-radius: var(--radius-md); }
@keyframes shimmer { 0% { background-position: 100% 0; } 100% { background-position: -100% 0; } }

/* Empty state */
.empty-state { text-align: center; padding: var(--sp-9) var(--sp-5); color: var(--mocha-soft); }
.empty-state .icon { font-size: 40px; margin-bottom: var(--sp-4); }

/* Toast */
.toast { position: fixed; bottom: 24px; right: 24px; background: var(--mocha); color: var(--ivory); padding: 14px 22px; border-radius: var(--radius-sm); box-shadow: var(--shadow-lg); font-size: 14px; z-index: 999; display: flex; align-items: center; gap: 10px; transform: translateY(20px); opacity: 0; transition: all var(--dur-med) var(--ease); }
.toast.show { transform: translateY(0); opacity: 1; }

/* Fade-in-on-scroll utility */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease); }
.reveal.in-view { opacity: 1; transform: translateY(0); }

/* Utility */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.gap-2 { gap: var(--sp-2); }
.gap-3 { gap: var(--sp-3); }
.gap-4 { gap: var(--sp-4); }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }