/* =========================================================
   TERRASIA PENSION — Base Design System
   Minimal / Modern · warm neutral palette + clay accent
   ========================================================= */

:root {
  /* Color tokens */
  --color-bg: #faf9f6;
  --color-bg-alt: #f1efe9;
  --color-surface: #ffffff;
  --color-ink: #1c1a17;
  --color-ink-soft: #6b6660;
  --color-ink-faint: #a6a099;
  --color-line: #e6e2d8;
  --color-accent: #a9683d;
  --color-accent-dark: #8a5230;
  --color-accent-soft: #f1e4d6;
  --color-white: #ffffff;

  /* Type */
  --font-display: "Noto Serif KR", serif;
  --font-body: "Pretendard", -apple-system, BlinkMacSystemFont, "Malgun Gothic", sans-serif;

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

  /* Layout */
  --container-max: 1200px;
  --container-pad: 24px;
  --radius-sm: 4px;
  --radius-md: 10px;
  --radius-lg: 20px;
  --nav-height: 76px;

  /* Motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

@media (min-width: 900px) {
  :root { --container-pad: 64px; }
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4, p { margin: 0; }
button { font-family: inherit; cursor: pointer; }
input, textarea, select { font-family: inherit; }

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

.eyebrow {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: var(--sp-3);
}

h1, .h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(32px, 5vw, 56px);
  line-height: 1.25;
  letter-spacing: -0.01em;
}
h2, .h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(26px, 3.4vw, 38px);
  line-height: 1.3;
}
h3, .h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(20px, 2.2vw, 24px);
  line-height: 1.4;
}
.lede {
  font-size: clamp(16px, 1.6vw, 19px);
  color: var(--color-ink-soft);
}
.muted { color: var(--color-ink-soft); }
.small { font-size: 13px; color: var(--color-ink-faint); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: 15px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease);
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }
.btn-primary {
  background: var(--color-ink);
  color: var(--color-white);
}
.btn-primary:hover { background: var(--color-accent-dark); }
.btn-outline {
  background: transparent;
  border-color: var(--color-ink);
  color: var(--color-ink);
}
.btn-outline:hover { background: var(--color-ink); color: var(--color-white); }
.btn-accent {
  background: var(--color-accent);
  color: var(--color-white);
}
.btn-accent:hover { background: var(--color-accent-dark); }
.btn-ghost {
  background: transparent;
  color: var(--color-ink-soft);
  padding: 15px 8px;
}
.btn-ghost:hover { color: var(--color-ink); }
.btn[disabled] { opacity: 0.45; pointer-events: none; }
.btn-block { width: 100%; }

/* ---------- Nav ---------- */
.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  z-index: 100;
  display: flex;
  align-items: center;
  background: transparent;
  transition: background 0.35s var(--ease), border-color 0.35s var(--ease), box-shadow .35s var(--ease);
  border-bottom: 1px solid transparent;
}
.site-nav.is-scrolled,
.site-nav.is-solid {
  background: rgba(250, 249, 246, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-line);
}
.site-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}
.brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.02em;
}
.brand small {
  display: block;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--color-ink-soft);
  margin-top: 2px;
}
.nav-links {
  display: none;
  align-items: center;
  gap: var(--sp-6);
  font-size: 14.5px;
  font-weight: 500;
}
.nav-links a { position: relative; padding: 6px 0; color: var(--color-ink-soft); transition: color .2s; }
.nav-links a:hover, .nav-links a.active { color: var(--color-ink); }
.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
}
.nav-cta { display: none; }
.nav-toggle {
  display: inline-flex;
  background: none;
  border: none;
  padding: 8px;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: "";
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-ink);
  position: relative;
  transition: transform .25s var(--ease), opacity .25s var(--ease);
}
.nav-toggle span::before { position: absolute; top: -7px; }
.nav-toggle span::after { position: absolute; top: 7px; }

@media (min-width: 860px) {
  .nav-links { display: flex; }
  .nav-cta { display: inline-flex; }
  .nav-toggle { display: none; }
}

.mobile-menu {
  position: fixed;
  inset: 0;
  background: var(--color-bg);
  z-index: 99;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--sp-5);
  padding: var(--sp-6);
  transform: translateY(-100%);
  transition: transform 0.4s var(--ease);
}
.mobile-menu.is-open { transform: translateY(0); }
.mobile-menu a { font-family: var(--font-display); font-size: 28px; }
.mobile-menu .btn { align-self: flex-start; margin-top: var(--sp-4); }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-ink);
  color: rgba(255,255,255,0.72);
  padding: var(--sp-9) 0 var(--sp-6);
  margin-top: var(--sp-10);
}
.site-footer .brand { color: #fff; }
.site-footer .brand small { color: rgba(255,255,255,0.5); }
.footer-grid {
  display: grid;
  gap: var(--sp-6);
  grid-template-columns: 1.4fr 1fr 1fr;
}
.footer-grid h4 {
  color: #fff;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--sp-3);
  font-weight: 600;
}
.footer-grid li { margin-bottom: var(--sp-2); font-size: 14px; }
.footer-bottom {
  margin-top: var(--sp-8);
  padding-top: var(--sp-5);
  border-top: 1px solid rgba(255,255,255,0.12);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--sp-3);
  font-size: 12.5px;
  color: rgba(255,255,255,0.45);
}
@media (max-width: 700px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* ---------- Section utilities ---------- */
.section { padding: var(--sp-9) 0; }
.section-tight { padding: var(--sp-7) 0; }
.section-alt { background: var(--color-bg-alt); }
.section-ink { background: var(--color-ink); color: #fff; }
.section-head {
  max-width: 640px;
  margin-bottom: var(--sp-7);
}
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

.grid { display: grid; gap: var(--sp-6); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.card-body { padding: var(--sp-5); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--color-accent-soft);
  color: var(--color-accent-dark);
}

.divider {
  height: 1px;
  background: var(--color-line);
  border: none;
  margin: var(--sp-7) 0;
}

.img-frame {
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(135deg, #e9e4d8, #d9d2c2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-ink-faint);
  font-size: 13px;
  text-align: center;
  padding: var(--sp-4);
}

/* ---------- Page hero (inner pages) ---------- */
.page-hero {
  padding: calc(var(--nav-height) + var(--sp-8)) 0 var(--sp-8);
  background: var(--color-bg-alt);
}
.page-hero .eyebrow { margin-bottom: var(--sp-3); }

/* ---------- Scroll progress ---------- */
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  background: var(--color-accent);
  z-index: 200;
  width: 0%;
  transition: width 0.1s linear;
}

/* ---------- Reveal-on-scroll ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Placeholder content notice ---------- */
.placeholder-note {
  display: block;
  background: var(--color-accent-soft);
  border: 1px dashed var(--color-accent);
  border-radius: var(--radius-md);
  padding: var(--sp-4) var(--sp-5);
  font-size: 13.5px;
  color: var(--color-accent-dark);
  margin-bottom: var(--sp-6);
}

/* ---------- Real photo frame (clickable, opens lightbox) ---------- */
.photo-frame {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-bg-alt);
  display: block;
  width: 100%;
  border: none;
  padding: 0;
  cursor: zoom-in;
}
.photo-frame img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s var(--ease);
}
.photo-frame:hover img { transform: scale(1.04); }
.photo-count-badge {
  position: absolute;
  right: 12px; bottom: 12px;
  background: rgba(28,26,23,0.65);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 5px 10px;
  border-radius: 999px;
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ---------- Lightbox (injected by js/lightbox.js) ---------- */
.lightbox-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15,14,12,0.9);
  z-index: 400;
  align-items: center;
  justify-content: center;
  padding: var(--sp-6);
}
.lightbox-backdrop.is-open { display: flex; }
.lightbox-stage {
  position: relative;
  max-width: 92vw;
  max-height: 86vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.lightbox-stage img {
  max-width: 92vw;
  max-height: 80vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  display: block;
}
.lightbox-close {
  position: absolute;
  top: -46px; right: 0;
  background: none; border: none;
  color: #fff; font-size: 30px; line-height: 1;
  padding: 6px 10px;
}
.lightbox-nav {
  position: absolute;
  top: 50%; transform: translateY(-50%);
  background: rgba(255,255,255,0.14);
  border: none; color: #fff;
  width: 44px; height: 44px;
  border-radius: 50%;
  font-size: 20px;
  cursor: pointer;
  transition: background 0.2s;
}
.lightbox-nav:hover { background: rgba(255,255,255,0.28); }
.lightbox-prev { left: -58px; }
.lightbox-next { right: -58px; }
.lightbox-counter {
  position: absolute;
  bottom: -34px; left: 50%;
  transform: translateX(-50%);
  color: rgba(255,255,255,0.75);
  font-size: 13px;
  letter-spacing: 0.02em;
}
@media (max-width: 820px) {
  .lightbox-prev { left: 6px; }
  .lightbox-next { right: 6px; }
  .lightbox-close { top: 8px; right: 8px; }
}