:root {
  --ui-font: 'Pretendard Variable', 'Pretendard', 'Noto Sans KR', 'Apple SD Gothic Neo', 'Malgun Gothic', 'Segoe UI', sans-serif;
  --bg: #f4f7f6;
  --bg-soft: #e9f1ef;
  --header-bg: rgba(244, 247, 246, 0.86);
  --surface: rgba(255, 255, 255, 0.88);
  --surface-strong: #ffffff;
  --surface-soft: rgba(15, 118, 110, 0.05);
  --surface-soft-strong: rgba(15, 118, 110, 0.1);
  --text: #333333;
  --heading: #115E59;
  --muted: #555555;
  --line: rgba(15, 118, 110, 0.14);
  --line-strong: rgba(15, 118, 110, 0.24);
  --accent: #0f766e;
  --accent-hover: #115e59;
  --button-text: #ffffff;
  --glow-a: rgba(15, 118, 110, 0.08);
  --glow-b: rgba(15, 118, 110, 0.14);
  --hero-accent: linear-gradient(135deg, rgba(15, 118, 110, 0.14), rgba(15, 118, 110, 0.04));
  --shadow: 0 24px 70px rgba(15, 118, 110, 0.12);
  --radius-xl: 34px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --content: 1180px;
  --site-header-bg: var(--header-bg);
  --site-header-border: var(--line);
  --site-heading-color: var(--heading);
  --site-muted-color: var(--muted);
  --site-surface-soft: var(--surface-soft);
  --site-nav-gap: 0.8rem;
  --site-nav-item-padding: 0.58rem 0.84rem;
  --site-nav-button-border: var(--line);
  --site-nav-panel-bg: var(--surface-strong);
  --site-shell-shadow: var(--shadow);
  --site-footer-padding: 2rem 20px 3rem;
  --site-footer-bg: transparent;
  --site-footer-text: var(--muted);
  --site-footer-border: var(--line);
}

html[data-theme="dark"] {
  --bg: #0b1520;
  --bg-soft: #101c28;
  --header-bg: rgba(11, 21, 32, 0.82);
  --surface: rgba(12, 24, 36, 0.88);
  --surface-strong: rgba(16, 29, 42, 0.96);
  --surface-soft: rgba(155, 229, 219, 0.06);
  --surface-soft-strong: rgba(155, 229, 219, 0.1);
  --text: #9be5db;
  --heading: #e7f0fa;
  --muted: #76d9ca;
  --line: rgba(155, 229, 219, 0.14);
  --line-strong: rgba(155, 229, 219, 0.24);
  --accent: #9be5db;
  --accent-hover: #b7efe7;
  --button-text: #0b1520;
  --glow-a: rgba(155, 229, 219, 0.12);
  --glow-b: rgba(15, 118, 110, 0.18);
  --hero-accent: linear-gradient(135deg, rgba(155, 229, 219, 0.18), rgba(15, 118, 110, 0.08));
  --shadow: 0 30px 90px rgba(3, 9, 15, 0.42);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--ui-font);
  color: var(--text);
  background:
    radial-gradient(circle at 12% 16%, var(--glow-a), transparent 22%),
    radial-gradient(circle at 88% 12%, var(--glow-b), transparent 22%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-soft) 100%);
  line-height: 1.72;
  transition: background 220ms ease, color 220ms ease;
  word-break: keep-all;
  overflow-wrap: break-word;
}

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

a:hover {
  opacity: 0.94;
}

main {
  display: block;
}

.container {
  width: min(calc(100% - 2rem), var(--content));
  margin: 0 auto;
}

.progress-bar {
  position: fixed;
  inset: 0 0 auto;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), color-mix(in srgb, var(--accent) 62%, #ffffff));
  transform-origin: left;
  transform: scaleX(0);
  z-index: 100;
}

.button,
.button-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.74rem 1.16rem;
  border-radius: 999px;
  font-weight: 700;
  letter-spacing: -0.02em;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}

.button {
  border: 0;
  background: var(--accent);
  color: var(--button-text);
  box-shadow: 0 6px 18px rgba(15, 118, 110, 0.15);
}

.button:hover,
.button-ghost:hover,
.site-nav .home-theme-toggle:hover,
.card:hover,
.route-link:hover,
.topic-card:hover,
.side-card:hover {
  transform: translateY(-2px);
}

.button:hover {
  background: var(--accent-hover);
}

.button-ghost {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--heading);
}

.site-nav .home-theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.58rem 0.84rem;
  border: 1px solid var(--pn-border-main);
  background: transparent;
  color: var(--pn-card-heading);
  white-space: nowrap;
}

.site-nav .home-theme-toggle:hover,
.site-nav .home-theme-toggle:focus-visible {
  background: var(--pn-pill-bg);
}

.page-hero,
.article-hero {
  padding: 3rem 0 1.4rem;
}

.page-hero .container,
.article-hero .container {
  display: grid;
  gap: 1rem;
}

/* ── Blog home 2-column layout (main + sticky sidebar) ── */

.blog-home-layout {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
  align-items: start;
}

.blog-main-column {
  grid-column: span 3;
  display: grid;
  gap: 1rem;
  min-width: 0;
}

.blog-sidebar {
  align-self: stretch;
  padding-top: 0;
}

.blog-main-column > .section:last-child {
  padding-bottom: 0;
}

.blog-sidebar .test-cta-card {
  position: sticky;
  top: 8rem;
}

.blog-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) 272px;
  gap: 1rem;
  align-items: stretch;
}

.hero-panel,
.hero-side-card,
.card,
.topic-card,
.cta-band,
.article-layout,
.article-toc,
.preview-card,
.info-panel,
.note-panel,
.contact-panel,
.policy-panel {
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.hero-panel,
.article-layout,
.cta-band,
.info-panel,
.note-panel,
.contact-panel,
.policy-panel {
  border-radius: var(--radius-xl);
}

.hero-panel {
  position: relative;
  overflow: hidden;
  padding: 2rem;
  transform:
    perspective(1200px)
    rotateX(var(--hero-tilt-x, 0deg))
    rotateY(var(--hero-tilt-y, 0deg))
    translate3d(0, var(--hero-float-y, 0px), 0);
  transform-style: preserve-3d;
  transition: transform 220ms ease, box-shadow 220ms ease;
}

/* circle decoration removed */

.hero-panel > * {
  position: relative;
  z-index: 1;
}

.hero-side {
  display: grid;
  gap: 1rem;
  align-content: start;
}

.hero-side-card {
  padding: 0.85rem 0.9rem;
  border-radius: 24px;
  background: var(--surface);
  transform:
    perspective(1200px)
    rotateX(var(--hero-tilt-x, 0deg))
    rotateY(var(--hero-tilt-y, 0deg))
    translate3d(0, var(--hero-float-y, 0px), 0);
  transform-style: preserve-3d;
  transition: transform 220ms ease, box-shadow 220ms ease;
}

.test-cta-card {
  background: linear-gradient(160deg, var(--surface-soft-strong), var(--surface));
  border: 1px solid var(--line-strong);
}

[data-hero-motion].is-hero-motion-active {
  box-shadow: 0 28px 80px rgba(15, 118, 110, 0.18);
}

.hero-side-card.test-cta-card h3 {
  margin-top: 0.85rem;
  color: var(--accent);
  font-size: 1.16rem;
}

.test-cta-card p {
  margin-top: 0.5rem;
  font-size: 0.88rem;
}

.test-cta-card .button {
  width: 100%;
  justify-content: center;
}

.eyebrow,
.pill,
.meta-chip,
.breadcrumbs a,
.breadcrumbs span,
.route-tag,
.topic-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.46rem 0.82rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface-soft);
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.page-hero h1,
.article-hero h1,
.section-heading h2,
.article-layout h2,
.info-panel h2,
.note-panel h2,
.contact-panel h2,
.policy-panel h2 {
  margin: 0;
  color: var(--heading);
  line-height: 0.96;
  letter-spacing: -0.05em;
}

.page-hero h1,
.article-hero h1 {
  font-size: clamp(1.8rem, 4.2vw, 3rem);
  line-height: 1.30;
}

.section-heading h2,
.article-layout h2,
.info-panel h2,
.note-panel h2,
.contact-panel h2,
.policy-panel h2 {
  font-size: clamp(1.9rem, 4vw, 3rem);
}

.page-hero p,
.article-hero p,
.section-heading p,
.card p,
.topic-card p,
.topic-list,
.hero-side-card p,
.article-layout p,
.article-layout li,
.policy-panel p,
.policy-panel li,
.contact-panel p,
.info-panel p,
.note-panel p,
.trend-line span {
  color: var(--muted);
}

.hero-actions,
.card-footer,
.article-meta,
.breadcrumbs,
.pill-row,
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.topic-grid,
.post-grid,
.grid-2,
.route-list,
.trend-stack,
.contact-cards,
.info-grid {
  display: grid;
  gap: 1rem;
}

.hero-actions {
  margin-top: 1.4rem;
}

.route-list,
.trend-stack {
  gap: 0.75rem;
}

.hero-route-list {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: stretch;
}

.route-link,
.trend-line {
  display: block;
  padding: 0.95rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface-soft);
}

.route-link strong,
.trend-line strong,
.card h3,
.article-card-title,
.topic-card h3,
.hero-side-card h3,
.article-layout h3,
.contact-card strong {
  display: block;
  margin: 0;
  color: var(--heading);
  line-height: 1.32;
  letter-spacing: -0.03em;
}

.route-link span,
.trend-line span {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.92rem;
}

.hero-route-list .route-link {
  height: 100%;
}

.section {
  padding: 1.2rem 0 3rem;
}

.section-heading {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.7rem 1rem;
  margin-bottom: 0rem;
}

.section-heading .eyebrow {
  grid-column: 1;
  justify-self: start;
  letter-spacing: 0.04em;
}

.section-heading h2 {
  grid-column: 1;
  grid-row: 2;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  letter-spacing: 0.02em;
  margin-top: 0.3rem;
}

.section-heading > p {
  margin: 0;
  grid-row: 2;
  grid-column: 2;
  transform: translateY(-0.25rem);
}

.post-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

/* 1행: 큰 카드(span 2) + 작은 카드(1칸) — 3열 그리드 */
.post-row-top {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.post-row-top .card.is-feature {
  grid-column: span 2;
}

/* 2행: 작은 카드 4개 — 4열 그리드 */
.post-row-bottom {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 2.5rem;
}

.card {
  display: flex;
  flex-direction: column;
  gap: 0.95rem;
  padding: 1.35rem;
  border-radius: var(--radius-lg);
  min-height: 100%;
  position: relative;
  cursor: pointer;
}

.card-link::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
}

.card.is-feature {
  grid-column: span 2;
  background: linear-gradient(160deg, var(--surface-soft-strong), var(--surface));
  border-color: var(--line-strong);
}

.card h3,
.article-card-title,
.topic-card h3 {
  font-size: 1.34rem;
  text-align: center;
  margin-top: 1.2rem;
}

.topic-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.topic-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface-soft);
  color: var(--heading);
  font-size: 0.92rem;
  transition: background 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.topic-list a::after {
  content: '→';
  font-size: 0.85rem;
  color: var(--accent);
  flex-shrink: 0;
}

.topic-list a:hover {
  background: var(--surface-soft-strong);
  border-color: var(--accent);
  transform: translateX(2px);
}

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.8rem;
  margin-top: auto;
  font-size: 0.92rem;
}

.topic-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.topic-card {
  padding: 1.2rem;
  border-radius: var(--radius-lg);
}

.cta-band {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) 280px;
  gap: 1rem;
  align-items: center;
  padding: 1.5rem;
}

.cta-band-title {
  font-size: clamp(2rem, 4vw, 2.65rem);
  line-height: 1.14;
}

.preview-card {
  padding: 1rem;
  border-radius: 22px;
  border: 1px solid var(--line);
  background: var(--surface-soft);
}

.article-layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 1.5rem;
  padding: 1.5rem;
}

.article-toc {
  position: sticky;
  top: 6rem;
  align-self: start;
  padding: 1rem;
  border-radius: 22px;
  background: var(--surface-soft);
}

.article-toc strong {
  display: block;
  margin-bottom: 0.7rem;
  color: var(--heading);
}

.article-toc a {
  display: block;
  padding: 0.35rem 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.article-body {
  min-width: 0;
}

.article-body h2 {
  margin: 2.2rem 0 0.9rem;
  scroll-margin-top: 6rem;
}

.article-body h3 {
  margin: 1.5rem 0 0.65rem;
  color: var(--heading);
  font-size: 1.15rem;
}

.article-body ul,
.article-body ol,
.policy-panel ul {
  padding-left: 1.2rem;
}

.article-body blockquote,
.note-panel blockquote {
  margin: 1.3rem 0;
  padding: 1rem 1.2rem;
  border-left: 4px solid var(--accent);
  border-radius: 0 16px 16px 0;
  background: var(--surface-soft);
  color: var(--heading);
}

.related-posts {
  margin-top: 2rem;
}

.related-posts .grid-2,
.grid-2,
.info-grid,
.contact-cards {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.info-panel,
.note-panel,
.contact-panel,
.policy-panel {
  padding: 1.5rem;
}

.contact-cards {
  gap: 1rem;
}

.contact-card {
  padding: 1.1rem;
  border-radius: 22px;
  border: 1px solid var(--line);
  background: var(--surface-soft);
}

@media (max-width: 960px) {
  .blog-home-layout {
    grid-template-columns: 1fr;
  }

  .blog-sidebar {
    position: static;
  }

  .post-row-top,
  .post-row-bottom,
  .blog-hero-grid,
  .post-grid,
  .topic-grid,
  .cta-band,
  .article-layout,
  .grid-2,
  .info-grid,
  .contact-cards,
  .related-posts .grid-2 {
    grid-template-columns: 1fr;
  }

  .card.is-feature {
    grid-column: auto;
  }

  .article-toc {
    position: static;
  }
}

@media (max-width: 640px) {
  .section-heading {
    grid-template-columns: 1fr;
  }

  .section-heading > p {
    grid-row: auto;
    grid-column: 1;
  }

  .page-hero,
  .article-hero {
    padding-top: 2.5rem;
  }

  .page-hero h1,
  .article-hero h1 {
    font-size: clamp(2.5rem, 12vw, 3.9rem);
  }

  .hero-route-list {
    grid-template-columns: 1fr;
  }

  .hero-panel,
  .card,
  .topic-card,
  .cta-band,
  .article-layout,
  .info-panel,
  .note-panel,
  .contact-panel,
  .policy-panel {
    padding: 1.2rem;
    border-radius: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero-panel,
  .hero-side-card {
    transition: none;
    transform: none;
  }
}


.article-meta,
.breadcrumbs,
.pill-row {
  align-items: center;
}

/* inline-style utilities */
.u-mt-07 { margin-top: 0.7rem; }
.u-mt-075 { margin-top: 0.75rem; }
.u-mt-08 { margin-top: 0.8rem; }
.u-mt-085 { margin-top: 0.85rem; }
.u-mt-09 { margin-top: 0.9rem; }
.u-mt-1 { margin-top: 1rem; }
.u-maxw-34 { max-width: 34rem; }
.u-maxw-46 { max-width: 46rem; }

.scroll-top-button,
.scroll-bottom-button {
  border: none;
  background: var(--accent);
  color: var(--button-text);
  box-shadow: 0 8px 20px rgba(15, 118, 110, 0.28);
}

.scroll-top-button {
  bottom: calc(68px + env(safe-area-inset-bottom));
}

.scroll-bottom-button {
  bottom: calc(16px + env(safe-area-inset-bottom));
}

.scroll-top-button:hover,
.scroll-bottom-button:hover {
  background: var(--accent-hover);
}

@media (max-width: 640px) {
  .scroll-top-button {
    right: 12px;
    bottom: calc(60px + env(safe-area-inset-bottom));
  }

  .scroll-bottom-button {
    right: 12px;
    bottom: calc(12px + env(safe-area-inset-bottom));
  }
}