@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,500;9..144,700&family=Source+Sans+3:wght@400;500;600;700&display=swap');

:root {
  color-scheme: light;
  --bg: #f6f1ea;
  --bg-alt: #fffaf3;
  --ink: #1d1b18;
  --muted: #5d5a54;
  --accent: #0f766e;
  --accent-dark: #0b5f59;
  --accent-soft: #dff4f1;
  --warn: #d97706;
  --card: #ffffff;
  --border: #e7e1d9;
  --shadow: 0 22px 60px rgba(24, 23, 20, 0.12);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --max: 1140px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: radial-gradient(circle at top, #fff6ea 0%, #f4eee6 50%, #efe9e0 100%);
  color: var(--ink);
  font-family: 'Source Sans 3', system-ui, sans-serif;
}

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  gap: 32px;
  padding: 64px clamp(24px, 4vw, 72px);
  max-width: var(--max);
  margin: 0 auto;
}

.hero-content h1 {
  font-family: 'Fraunces', serif;
  font-size: clamp(2.3rem, 3vw, 3.4rem);
  margin: 12px 0 16px;
}

.hero-content p {
  font-size: 1.05rem;
  color: var(--muted);
  line-height: 1.6;
  max-width: 640px;
}

.eyebrow {
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-dark);
  font-weight: 700;
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin: 24px 0 16px;
  flex-wrap: wrap;
}

.button {
  padding: 12px 18px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  transition: all 0.2s ease;
}

.button.primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 10px 24px rgba(15, 118, 110, 0.28);
}

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

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

.hero-meta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 0.9rem;
}

.hero-panel {
  display: grid;
  gap: 16px;
  align-content: start;
}

.panel-card {
  background: var(--card);
  padding: 20px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow);
  border: 1px solid rgba(15, 118, 110, 0.08);
}

.panel-card h3 {
  margin: 0 0 6px;
  font-size: 1.1rem;
}

.panel-card p {
  margin: 0 0 8px;
  color: var(--muted);
}

.panel-card .link {
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
}

.content {
  max-width: var(--max);
  width: 100%;
  margin: 0 auto 40px;
  padding: 0 clamp(24px, 4vw, 72px);
  display: grid;
  gap: 28px;
  grid-template-columns: minmax(0, 260px) minmax(0, 1fr);
}

.toc {
  position: sticky;
  top: 24px;
  align-self: start;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px;
  box-shadow: 0 18px 40px rgba(29, 27, 24, 0.08);
}

.toc-header {
  display: grid;
  gap: 12px;
  margin-bottom: 12px;
}

.toc-header span {
  font-weight: 700;
  font-size: 1rem;
}

.toc input {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  font-size: 0.95rem;
}

.toc ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 8px;
}

.toc a {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.95rem;
}

.toc a.active {
  color: var(--accent);
  font-weight: 700;
}

main {
  display: grid;
  gap: 22px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: 0 18px 40px rgba(24, 23, 20, 0.08);
}

.card h2 {
  font-family: 'Fraunces', serif;
  margin-top: 0;
  font-size: 1.8rem;
}

.card h3 {
  margin-bottom: 8px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.scenario-card {
  background: var(--bg-alt);
  border-radius: var(--radius-md);
  padding: 16px;
  border: 1px solid var(--border);
}

.scenario-card h3 {
  margin-top: 0;
}

.scenario-card ol {
  margin: 0;
  padding-left: 18px;
}

.login-variant {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px;
  margin-bottom: 12px;
}

.login-variant h4 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.login-variant ol {
  margin: 0;
  padding-left: 18px;
}

.start-card {
  background: var(--bg-alt);
  border-radius: var(--radius-md);
  padding: 18px;
  border: 1px solid var(--border);
}

.start-card h3 {
  margin-top: 0;
}

ol,
ul {
  padding-left: 18px;
  line-height: 1.6;
}

ul.plain {
  list-style: none;
  padding-left: 0;
}

.note,
.tip {
  margin-top: 16px;
  padding: 14px 16px;
  border-radius: 14px;
  border-left: 4px solid var(--accent);
  background: var(--accent-soft);
  color: var(--accent-dark);
}

.tip {
  border-left-color: var(--warn);
  background: #fff6e6;
  color: #9a5700;
}

.rating-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin: 16px 0;
  text-align: center;
}

.rating-item {
  display: grid;
  gap: 8px;
  justify-items: center;
}

.rating-swatch {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  box-shadow: 0 10px 20px rgba(15, 23, 42, 0.18);
}

.rating-swatch.tone-green {
  background: #5aa517;
}

.rating-swatch.tone-amber {
  background: #ff8f27;
}

.rating-swatch.tone-red {
  background: #da482e;
}

.rating-swatch.tone-blue {
  background: #31b0ff;
}

.faq {
  display: grid;
  gap: 18px;
}

.footer {
  margin-top: auto;
  padding: 30px clamp(24px, 4vw, 72px);
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  border-top: 1px solid var(--border);
}

.scroll-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: var(--accent);
  color: #fff;
  font-size: 1.2rem;
  cursor: pointer;
  box-shadow: 0 12px 24px rgba(15, 118, 110, 0.24);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.scroll-top.visible {
  opacity: 1;
  pointer-events: auto;
}

@media (max-width: 980px) {
  .hero {
    grid-template-columns: 1fr;
  }

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

  .toc {
    position: static;
  }
}

@media (max-width: 720px) {
  .grid-2,
  .grid-3,
  .rating-grid {
    grid-template-columns: 1fr;
  }

  .hero-meta {
    flex-direction: column;
    gap: 6px;
  }

  .footer {
    flex-direction: column;
    gap: 8px;
  }
}