:root {
  --bg: #f4efe4;
  --bg-soft: #ece2cf;
  --card: rgba(255, 252, 246, 0.88);
  --ink: #1d1c19;
  --ink-soft: #4f4a41;
  --line: rgba(29, 28, 25, 0.12);
  --accent: #0f5b56;
  --accent-soft: #d5ebe7;
  --warm: #9e4f2f;
  --shadow: 0 18px 40px rgba(29, 28, 25, 0.12);
  --radius: 22px;
  --max-width: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(15, 91, 86, 0.12), transparent 32%),
    radial-gradient(circle at bottom right, rgba(158, 79, 47, 0.14), transparent 28%),
    linear-gradient(180deg, #f7f2e8 0%, var(--bg) 100%);
  font-family: "Palatino Linotype", "Book Antiqua", "Iowan Old Style", "Times New Roman", serif;
  line-height: 1.6;
}

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

p {
  margin: 0;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.08;
  font-weight: 600;
  letter-spacing: -0.03em;
}

.page-shell {
  min-height: 100vh;
}

.site-header,
.site-footer,
main {
  width: min(calc(100% - 32px), var(--max-width));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 0;
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  background: linear-gradient(145deg, var(--accent), #193b38);
  color: #f9f4ea;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
}

.brand-text {
  font-size: 1rem;
  font-weight: 600;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 250, 243, 0.72);
}

.site-nav a {
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.site-nav a.is-active,
.site-nav a:hover {
  background: var(--accent-soft);
  color: var(--accent);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 250, 243, 0.72);
}

.lang-switch a {
  min-width: 42px;
  padding: 8px 10px;
  border-radius: 999px;
  text-align: center;
  color: var(--ink-soft);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.lang-switch a.is-active,
.lang-switch a:hover {
  background: var(--accent-soft);
  color: var(--accent);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  border: 0;
  background: transparent;
  padding: 6px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--ink);
}

.hero {
  display: grid;
  grid-template-columns: 1.25fr 0.95fr;
  gap: 28px;
  padding: 36px 0 30px;
}

.hero-copy,
.hero-panel,
.feature-card,
.flow-card,
.note-block,
.resource-block,
.project-card,
.detail-card,
.steps-block,
.warning-block,
.link-panel {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow);
}

.hero-copy {
  padding: 38px;
}

.hero-copy::after,
.hero-panel::after,
.feature-card::after,
.project-card::after {
  content: "";
  position: absolute;
  inset: auto -30px -40px auto;
  width: 140px;
  height: 140px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(15, 91, 86, 0.13), transparent 68%);
}

.eyebrow,
.card-tag,
.panel-title {
  color: var(--warm);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero h1,
.page-intro h1 {
  font-size: clamp(2.4rem, 6vw, 4.6rem);
  margin-top: 14px;
  max-width: 11ch;
}

.hero-text,
.page-intro p:last-child {
  margin-top: 18px;
  max-width: 60ch;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: transform 180ms ease, background 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  background: var(--accent);
  color: #f8f3eb;
}

.button-secondary {
  background: transparent;
  border-color: var(--line);
}

.hero-panel {
  padding: 28px;
}

.stack-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.stack-list li {
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 14px;
  align-items: start;
  padding: 14px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.48);
}

.stack-index,
.project-no,
.flow-step {
  display: inline-grid;
  place-items: center;
  width: 54px;
  height: 54px;
  border-radius: 16px;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 700;
}

.stack-list p,
.feature-card p,
.flow-card p,
.project-card p,
.detail-card p,
.steps-block p,
.warning-block p,
.link-panel p {
  color: var(--ink-soft);
}

.section-grid,
.flow-grid,
.project-grid,
.detail-grid {
  display: grid;
  gap: 22px;
}

.section-grid {
  grid-template-columns: repeat(3, 1fr);
  padding: 18px 0 12px;
}

.feature-card {
  padding: 24px;
}

.feature-card h2,
.note-block h2,
.resource-block h2,
.steps-block h2,
.warning-block h2,
.link-panel h2 {
  margin-top: 10px;
  font-size: 1.5rem;
}

.feature-links,
.link-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.feature-links a,
.link-list a,
.project-card a {
  color: var(--accent);
  font-weight: 600;
}

.timeline {
  padding: 34px 0 56px;
}

.timeline-header {
  margin-bottom: 18px;
}

.timeline-header h2 {
  margin-top: 10px;
  font-size: 2.2rem;
}

.timeline-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.timeline-list article {
  padding: 24px;
  border-top: 4px solid var(--accent);
  border-radius: 18px;
  background: rgba(255, 253, 248, 0.76);
  box-shadow: var(--shadow);
}

.timeline-list span {
  color: var(--warm);
  font-weight: 700;
}

.timeline-list h3 {
  margin-top: 10px;
  font-size: 1.4rem;
}

.content-page {
  padding: 30px 0 56px;
}

.page-intro {
  padding: 20px 0 28px;
}

.flow-grid {
  grid-template-columns: repeat(5, 1fr);
}

.flow-card,
.project-card,
.detail-card,
.steps-block,
.warning-block,
.note-block,
.resource-block,
.link-panel {
  padding: 24px;
}

.flow-card h2,
.project-card h2,
.detail-card h2 {
  margin-top: 16px;
  font-size: 1.35rem;
}

.project-grid,
.detail-grid {
  grid-template-columns: repeat(3, 1fr);
}

.project-card,
.detail-card {
  min-height: 220px;
}

.ordered-list {
  margin: 18px 0 0;
  padding-left: 22px;
}

.ordered-list li + li {
  margin-top: 10px;
}

.note-block,
.resource-block,
.steps-block,
.warning-block,
.link-panel {
  margin-top: 22px;
}

.warning-block {
  border-color: rgba(158, 79, 47, 0.24);
  background: rgba(255, 246, 238, 0.88);
}

.centered-page {
  display: grid;
  place-items: center;
  text-align: center;
  min-height: 72vh;
}

.site-footer {
  padding: 18px 0 34px;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

@media (max-width: 960px) {
  .hero,
  .section-grid,
  .timeline-list,
  .project-grid,
  .detail-grid {
    grid-template-columns: 1fr;
  }

  .flow-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .site-header {
    flex-wrap: wrap;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .header-actions {
    margin-left: auto;
  }

  .site-nav {
    display: none;
    width: 100%;
    border-radius: 22px;
    padding: 8px;
    flex-direction: column;
    align-items: stretch;
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    text-align: center;
  }
}

@media (max-width: 640px) {
  .site-header,
  .site-footer,
  main {
    width: min(calc(100% - 20px), var(--max-width));
  }

  .hero-copy,
  .hero-panel,
  .feature-card,
  .flow-card,
  .project-card,
  .detail-card,
  .steps-block,
  .warning-block,
  .note-block,
  .resource-block,
  .link-panel {
    padding: 20px;
  }

  .hero h1,
  .page-intro h1 {
    max-width: none;
  }

  .flow-grid {
    grid-template-columns: 1fr;
  }

  .header-actions {
    width: 100%;
    justify-content: space-between;
  }
}