:root {
  --bg: #f4efe7;
  --bg-alt: #fbf8f2;
  --surface: #fffdf8;
  --surface-strong: #f3e6d4;
  --text: #18212b;
  --muted: #55606d;
  --border: #dcc9b4;
  --accent: #8f3b14;
  --accent-2: #d88733;
  --shadow: 0 18px 40px rgba(24, 33, 43, 0.08);
  --radius: 22px;
  --shell: 1180px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(216, 135, 51, 0.18), transparent 28%),
    linear-gradient(180deg, #fbf7ef 0%, #f3eee5 100%);
  line-height: 1.65;
  padding-bottom: 10rem;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
}

.floating-cta-stack {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  width: min(280px, calc(100vw - 1.5rem));
}

.floating-cta {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 0.95rem 1.1rem;
  border-radius: 20px;
  border: 1px solid rgba(24, 33, 43, 0.1);
  box-shadow: 0 20px 45px rgba(24, 33, 43, 0.18);
  backdrop-filter: blur(14px);
  text-decoration: none;
}

.floating-cta:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.floating-cta strong {
  font-size: 1rem;
  letter-spacing: 0.01em;
}

.floating-cta span {
  font-size: 0.85rem;
  opacity: 0.88;
}

.floating-cta-ai {
  background: linear-gradient(135deg, #18212b 0%, #2f4356 100%);
  color: #f7f6f2;
}

.floating-cta-app {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  color: #fff8ef;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(12px);
  background: rgba(251, 247, 239, 0.9);
  border-bottom: 1px solid rgba(220, 201, 180, 0.8);
}

.header-shell,
.footer-grid,
.hero-grid,
.prose-grid {
  display: grid;
  gap: 1.5rem;
}

.header-shell {
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  padding: 1rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  color: inherit;
}

.brand:hover {
  text-decoration: none;
}

.brand strong,
.brand small {
  display: block;
}

.brand small {
  color: var(--muted);
  font-size: 0.88rem;
}

.brand-mark {
  display: inline-block;
  width: 3.25rem;
  height: 3.25rem;
  flex: 0 0 auto;
  overflow: hidden;
}

.brand-mark img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 1rem;
  font-size: 0.95rem;
}

.site-nav a {
  color: var(--text);
}

.site-nav-shell {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.nav-toggle-input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.nav-toggle-button {
  display: none;
  width: 3.25rem;
  height: 3.25rem;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.32rem;
  border-radius: 18px;
  background: rgba(255, 253, 248, 0.92);
  border: 1px solid rgba(220, 201, 180, 0.95);
  box-shadow: var(--shadow);
  cursor: pointer;
}

.nav-toggle-button span {
  width: 1.3rem;
  height: 2px;
  border-radius: 999px;
  background: var(--text);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.hero,
.section {
  padding: 3rem 0;
}

.hero {
  padding-top: 4rem;
}

.hero-grid,
.prose-grid {
  grid-template-columns: 1.5fr 0.9fr;
  align-items: start;
}

.hero h1,
.section h1 {
  margin: 0.2rem 0 1rem;
  font-size: clamp(2.2rem, 4vw, 4.4rem);
  line-height: 1.02;
  letter-spacing: -0.04em;
}

.lead {
  font-size: 1.15rem;
  color: var(--muted);
}

.eyebrow {
  margin: 0 0 0.8rem;
  color: var(--accent);
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero-panel,
.card,
.term-hero,
.detail-card {
  background: var(--surface);
  border: 1px solid rgba(220, 201, 180, 0.95);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-panel,
.term-hero {
  padding: 1.5rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 1.6rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.8rem 1.2rem;
  border-radius: 999px;
  background: var(--accent);
  color: #fff9f2;
  font-weight: 700;
}

.button:hover {
  text-decoration: none;
  background: #6e2f13;
}

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

.stat-block + .stat-block {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.stat-block strong {
  display: block;
  font-size: 2.1rem;
}

.section-alt {
  background: linear-gradient(180deg, rgba(255, 250, 242, 0.72), rgba(243, 230, 212, 0.5));
  border-top: 1px solid rgba(220, 201, 180, 0.75);
  border-bottom: 1px solid rgba(220, 201, 180, 0.75);
}

.section-heading {
  max-width: 60rem;
  margin-bottom: 1.5rem;
}

.section-heading-tight {
  margin-bottom: 1rem;
}

.feature-grid,
.card-grid,
.details-grid,
.alpha-grid,
.qa-grid {
  display: grid;
  gap: 1rem;
}

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

.card-grid {
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}

.alpha-grid {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.qa-grid {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.card,
.detail-card,
.prose-card {
  padding: 1.4rem;
}

.answer-strip {
  margin: 1rem 0 0;
  padding: 0.9rem 1rem;
  border-radius: 18px;
  background: var(--surface-strong);
  border: 1px solid var(--border);
}

.summary-grid,
.qa-stack {
  margin-bottom: 2rem;
}

.qa-card h3 {
  margin: 0 0 0.7rem;
  font-size: 1.08rem;
}

.compact-card h2,
.compact-card h3,
.term-card h3,
.prose-card h2,
.detail-card h2 {
  margin-top: 0;
}

.text-link {
  font-weight: 700;
}

.chip-list,
.link-list,
.term-inline-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.chip-list li {
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  background: var(--surface-strong);
  border: 1px solid var(--border);
  font-size: 0.92rem;
}

.link-list li + li,
.term-inline-list li + li {
  margin-top: 0.65rem;
}

.term-inline-list a {
  color: var(--text);
}

.stack + .stack {
  margin-top: 2rem;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-bottom: 1.5rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.breadcrumb span[aria-current="page"] {
  color: var(--text);
  font-weight: 700;
}

.language-switcher {
  margin: 1.5rem 0 2rem;
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.pill-row a {
  padding: 0.5rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-alt);
  color: var(--text);
}

.pill-row a[aria-current="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff9f2;
}

.site-footer {
  padding: 3rem 0 4rem;
}

.footer-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

@media (max-width: 960px) {
  .hero-grid,
  .prose-grid,
  .feature-grid,
  .details-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .site-nav {
    justify-content: flex-start;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 0.97rem;
    padding-bottom: 11rem;
  }

  .hero,
  .section {
    padding: 2.2rem 0;
  }

  .header-shell {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.9rem;
    padding: 0.85rem 0;
  }

  .brand {
    min-width: 0;
  }

  .brand small {
    display: none;
  }

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

  .button,
  .site-nav a,
  .pill-row a {
    width: 100%;
    justify-content: center;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 0.7rem);
    right: 0;
    width: min(320px, calc(100vw - 2rem));
    padding: 0.8rem;
    border-radius: 22px;
    background: rgba(255, 253, 248, 0.98);
    border: 1px solid rgba(220, 201, 180, 0.98);
    box-shadow: 0 24px 50px rgba(24, 33, 43, 0.16);
    gap: 0.55rem;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
  }

  .site-nav a {
    min-height: 2.9rem;
    padding: 0.8rem 1rem;
    border-radius: 16px;
    background: var(--surface);
    border: 1px solid rgba(220, 201, 180, 0.8);
  }

  .nav-toggle-input:checked + .nav-toggle-button + .site-nav {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
  }

  .nav-toggle-input:checked + .nav-toggle-button span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }

  .nav-toggle-input:checked + .nav-toggle-button span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle-input:checked + .nav-toggle-button span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }

  .floating-cta-stack {
    left: 0.75rem;
    right: 0.75rem;
    bottom: 0.75rem;
    width: auto;
  }
}