/*
Theme Name: MG Theme Lab
Description: MG standard starter theme (home.php + page scripts + GNB)
Author: Manual Graphics
Version: 1.3.2
Text Domain: mg-theme-lab
*/

:root {
  /* Primary (주조색) */
  --c1: #1f3a8a;
  --c2: #1e40af;
  --c3: #2563eb;

  /* Secondary (보조색) */
  --s1: #0f766e;
  --s2: #0d9488;
  --s3: #f59e0b;

  /* Gray scale (은은한 회색) */
  --g1: #0f172a;
  --g2: #1e293b;
  --g3: #334155;
  --g4: #475569;
  --g5: #64748b;
  --g6: #94a3b8;
  --g7: #cbd5e1;
  --g8: #e2e8f0;
  --g9: #f1f5f9;
  --g10: #f8fafc;

  /* Background / Surface */
  --bg1: #ffffff;
  --bg2: #f8fafc;
  --bg3: #f1f5f9;
  --bg4: #eef2ff;
  --bg5: #f0fdfa;
  --bg6: #fffbeb;

  /* Text */
  --t1: var(--g1);
  --t2: var(--g3);
  --t3: var(--g4);
  --t4: var(--g6);

  --ln1: var(--g8);
  --ln2: var(--g7);

  --ff: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --fs-12: clamp(1.15rem, 0.72vw, 1.2rem);
  --fs-13: clamp(1.2rem, 0.78vw, 1.3rem);
  --fs-14: clamp(1.25rem, 0.85vw, 1.4rem);
  --fs-16: clamp(1.45rem, 0.96vw, 1.6rem);
  --fs-18: clamp(1.6rem, 1.06vw, 1.8rem);
  --fs-20: clamp(1.8rem, 1.2vw, 2rem);
  --fs-24: clamp(2rem, 1.45vw, 2.4rem);
  --fs-28: clamp(2.2rem, 2vw, 2.8rem);
  --fs-36: clamp(2.6rem, 3vw, 3.6rem);

  --sp8: .8rem;
  --sp12: 1.2rem;
  --sp16: 1.6rem;
  --sp20: 2rem;
  --sp24: 2.4rem;
  --sp32: 3.2rem;
  --sp48: 4.8rem;
  --sp64: 6.4rem;

  --container: 1200px;
}

* { box-sizing: border-box; }
html { font-size: 62.5%; scroll-behavior: auto; }
body {
  margin: 0;
  font-family: var(--ff);
  font-size: 1.6rem;
  color: var(--t1);
  background: var(--bg1);
  line-height: 1.6;
  letter-spacing: -0.01em;
}
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
img { display: block; max-width: 100%; height: auto; }

.lmt { width: min(100% - 3.2rem, var(--container)); margin-inline: auto; }

.site-header {
  border-bottom: 1px solid var(--ln1);
  position: sticky;
  top: 0;
  background: rgba(255,255,255,.9);
  backdrop-filter: blur(10px);
  z-index: 100;
}
.site-header .row {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp20);
}
.logo {
  font-size: var(--fs-20);
  font-weight: 800;
  color: var(--c1);
}
.gnb-toggle {
  display: none;
  border: 1px solid var(--ln1);
  background: var(--bg1);
  border-radius: 10px;
  padding: .6rem 1rem;
  font-size: var(--fs-13);
}
.gnb-menu {
  display: flex;
  align-items: center;
  gap: var(--sp16);
}
.gnb-menu a {
  font-size: var(--fs-14);
  color: var(--t3);
  font-weight: 600;
}
.gnb-menu .current-menu-item > a,
.gnb-menu .current_page_item > a {
  color: var(--c2);
}

.site-main { padding: var(--sp48) 0; }
.sec + .sec { margin-top: var(--sp64); }
.sec-hero {
  background: linear-gradient(135deg, var(--bg4), var(--bg5));
  border: 1px solid var(--ln1);
  border-radius: 18px;
  padding: var(--sp32);
}
.eyebrow {
  font-size: var(--fs-12);
  color: var(--s1);
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  margin-bottom: .8rem;
}
.sec-title {
  margin: 0;
  font-size: var(--fs-36);
  line-height: 1.25;
}
.sec-title-sm {
  margin: 0;
  font-size: var(--fs-24);
  line-height: 1.3;
}
.sec-desc {
  margin-top: var(--sp12);
  color: var(--t3);
  font-size: var(--fs-16);
}
.sec-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: var(--sp16);
  margin-bottom: var(--sp20);
}
.sec-more {
  font-size: var(--fs-13);
  color: var(--c2);
  font-weight: 700;
}

.post-list .item {
  padding: 1.2rem 0;
  border-bottom: 1px solid var(--ln1);
}
.cat {
  display: inline-block;
  font-size: var(--fs-12);
  color: var(--s3);
  font-weight: 700;
  letter-spacing: .04em;
}
.post-list .title {
  display: block;
  font-size: var(--fs-20);
  line-height: 1.35;
  margin-top: .4rem;
}
.meta, .thumb-meta {
  margin-top: .6rem;
  font-size: var(--fs-12);
  color: var(--t3);
}

.thumb-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: var(--sp16);
}
.thumb-grid.two-col { grid-template-columns: repeat(2, minmax(0,1fr)); }

.thumb-card {
  border: 1px solid var(--ln1);
  border-radius: 14px;
  overflow: hidden;
  background: var(--bg2);
}
.thumb-card.empty {
  padding: 2rem;
  font-size: var(--fs-14);
  color: var(--t3);
}
.thumb-media {
  aspect-ratio: 16/9;
  background: var(--bg3);
  overflow: hidden;
}

/* UX-4: lazy image blur-up */
.thumb-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: blur(10px);
  transform: scale(1.03);
  opacity: .84;
  transition: filter .5s ease, transform .5s ease, opacity .5s ease;
}
.thumb-media img.is-loaded {
  filter: blur(0);
  transform: scale(1);
  opacity: 1;
}

.thumb-fallback {
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
  font-size: var(--fs-12);
  color: var(--c1);
  font-weight: 700;
}
.thumb-body { padding: var(--sp16); }
.thumb-title {
  margin: .6rem 0 0;
  font-size: var(--fs-18);
  line-height: 1.35;
}

.site-footer {
  margin-top: var(--sp64);
  padding: var(--sp24) 0;
  border-top: 1px solid var(--ln1);
  color: var(--t3);
  font-size: var(--fs-14);
}

/* UX-2: reveal animation */
.reveal {
  opacity: 0;
  transform: translate3d(0, 24px, 0);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.in {
  opacity: 1;
  transform: translate3d(0, 0, 0);
}

@media (max-width: 1023.98px) {
  .thumb-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
}

@media (max-width: 767.98px) {
  .site-header .row { min-height: 60px; }
  .gnb-toggle { display: inline-block; }
  .gnb {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg1);
    border-bottom: 1px solid var(--ln1);
    padding: 1.2rem 1.6rem;
  }
  .gnb.is-open { display: block; }
  .gnb-menu {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.2rem;
  }

  .sec-hero { padding: 2.2rem; }
  .thumb-grid,
  .thumb-grid.two-col { grid-template-columns: 1fr; }
}