:root {
  --bg: #080909;
  --surface: #0e1010;
  --text: #e1e2e2;
  --text-secondary: #8f9191;
  --accent: #91AAA6;
  --border: rgba(255, 255, 255, 0.04); /* Soften global border */
  --code-bg: rgba(255, 255, 255, 0.015); /* Reduce code block background contrast */
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--border);
}

a:hover {
  color: var(--accent);
  text-decoration-color: var(--accent);
}

:focus-visible {
  outline: 1.5px solid var(--accent);
  outline-offset: 2px;
}

/* Navigation */
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 2rem 1.5rem 0;
  max-width: 960px;
  margin: 0 auto;
  position: relative;
}

.nav-links {
  gap: 0.25rem;
  list-style: none;
}

.nav-links li {
  /* No specific flex display needed here for individual list items */
}

.nav-mark {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}

.nav-links a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.375rem 0.75rem;
  border-radius: 4px;
  transition: none;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
  background: var(--code-bg);
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  cursor: pointer;
  padding: 0.5rem 0.75rem;
  color: var(--text-secondary);
  font-family: var(--font);
  font-size: 0.8125rem;
}

.mobile-menu-toggle:hover {
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.15);
}

/* Hero */
.hero {
  padding: 4rem 1.5rem 3rem;
  max-width: 960px;
  margin: 0 auto;
}

.hero-content {
  max-width: 640px;
}

.hero-mark {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  margin-bottom: 1.5rem;
}

.hero-mark svg {
  width: 1.5rem;
  height: 1.5rem;
  opacity: 0.6;
  flex-shrink: 0;
}

.hero-mark span {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero h1 {
  font-size: clamp(1.625rem, 4.5vw, 2.5rem);
  font-weight: 500;
  line-height: 1.15;
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
  max-width: 500px;
}

.hero p {
  font-size: clamp(1rem, 2.5vw, 1.0625rem);
  color: var(--text-secondary);
  line-height: 1.65;
  max-width: 520px;
}

.hero-actions {
  margin-top: 1.75rem;
  display: flex;
  gap: 1.75rem;
  align-items: center;
  flex-wrap: wrap;
}

.hero-actions a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(145, 170, 166, 0.25);
  padding-bottom: 1px;
}

.hero-actions a:hover {
  color: var(--text);
  border-color: var(--text-secondary);
}

/* Main content */
.page {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 1.5rem 5rem;
}

.page section + section {
  margin-top: 3.5rem;
}

.page h2 {
  font-size: 1.375rem;
  font-weight: 500;
  margin-bottom: 1rem;
  color: var(--text);
  line-height: 1.3;
}

.page h3 {
  font-size: 1.0625rem;
  font-weight: 500;
  margin-bottom: 0.75rem;
  color: var(--text);
}

.page p {
  margin-bottom: 1.25rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.page p:last-child {
  margin-bottom: 0;
}

.page ul {
  margin-bottom: 1.25rem;
  padding-left: 1.25rem;
  color: var(--text-secondary);
}

.page li {
  margin-bottom: 0.5rem;
  line-height: 1.6;
}

.page li:last-child {
  margin-bottom: 0;
}

/* Prose links */
.page a,
.hero p a {
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--border);
}

.page a:hover,
.hero p a:hover {
  color: var(--accent);
  text-decoration-color: var(--accent);
}

/* Code */
code {
  font-family: var(--mono);
  font-size: 0.875em;
  color: #d0ddd9;
  background: var(--code-bg);
  padding: 0.125rem 0.375rem;
  border-radius: 3px;
  word-break: break-word;
}

pre {
  background: var(--code-bg);
  border: 1px solid rgba(255, 255, 255, 0.02);
  padding: 1rem 1.5rem;
  overflow-x: auto;
  margin-top: 1.5rem;
  margin-bottom: 1.5rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

pre code {
  background: none;
  padding: 0;
  color: var(--text);
  font-size: 0.875rem;
  line-height: 1.65;
  font-family: var(--mono);
}

/* Tables */
.table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
  font-size: 0.875rem;
}

.table th {
  text-align: left;
  padding: 0.75rem 1rem;
  color: var(--text-secondary);
  font-weight: 500;
  border-bottom: 1px solid var(--border);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.table td {
  padding: 0.75rem 1rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  line-height: 1.6;
}

.table tr:last-child td {
  border-bottom: none;
}

/* Footer */
footer {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

footer p {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.8125rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.45);
  font-size: 0.8125rem;
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--text);
}

/* Feedback */
.feedback {
  font-size: 0.8125rem;
  margin-top: 2.5rem;
}

.feedback a {
  color: inherit;
}

/* Short hero for inner pages */
.hero-short {
  padding: 3rem 1.5rem 2.5rem;
}

.hero-short h1 {
  font-size: clamp(1.375rem, 3.5vw, 2rem);
  max-width: 480px;
}

.hero-short .hero-content {
  max-width: 560px;
}

.hero-404 {
  padding-top: 5rem;
  padding-bottom: 4rem;
}

/* Utility */
.subtext {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: 0.75rem;
}

/* Previous design overrides */
html[data-design="previous"] {
  --border: rgba(255, 255, 255, 0.06);
  --code-bg: rgba(255, 255, 255, 0.03);
}

html[data-design="previous"] nav {
  display: flex;
  align-items: center;
  gap: 0;
  justify-content: flex-start;
}

html[data-design="previous"] .nav-links {
  display: flex;
  align-items: center;
  gap: 0;
}

html[data-design="previous"] .nav-links li {
  display: flex;
}

html[data-design="previous"] .nav-mark {
  font-weight: 600;
  color: var(--text);
  padding: 0.375rem 0.75rem;
  letter-spacing: 0.01em;
}

html[data-design="previous"] .mobile-menu-toggle {
  position: absolute;
  top: 2rem;
  right: 1.5rem;
  z-index: 101;
}

html[data-design="previous"] pre {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1.25rem 1.5rem;
  margin-top: 0;
  max-width: none;
  margin-left: 0;
  margin-right: 0;
}

/* Mobile */
@media (max-width: 768px) {
  nav {
    padding: 1.25rem 1rem 0;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.25rem;
    flex-direction: column;
    gap: 0;
    z-index: 100;
    margin: 0.5rem 1rem 0;
  }

  .nav-links.active {
    display: flex;
  }

  .nav-links a {
    padding: 0.75rem 1rem;
    font-size: 1rem;
    border-radius: 0;
  }

  .nav-links li:first-child a {
    border-radius: 6px 6px 0 0;
  }

  .nav-links li:last-child a {
    border-radius: 0 0 6px 6px;
  }

  .mobile-menu-toggle {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    min-height: 44px;
    min-width: 44px;
  }

  .hero {
    padding: 2.5rem 1rem 2rem;
  }

  .hero h1 {
    max-width: none;
  }

  .hero p {
    font-size: 1rem;
  }

  .hero-content {
    max-width: none;
  }

  .page {
    padding: 0 1rem 3rem;
  }

  .page section + section {
    margin-top: 2.5rem;
  }

  .feedback {
    margin-top: 2rem;
  }

  footer {
    padding: 1.5rem 1rem 2rem;
    flex-direction: column;
    text-align: center;
  }

  .table th {
    display: none;
  }

  .table td {
    display: block;
    padding: 0.5rem 0;
    border: none;
  }

  .table tr {
    display: block;
    padding: 0.75rem 0;
    margin-bottom: 1rem;
  }

  .table td::before {
    content: attr(data-label);
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
  }

  html[data-design="previous"] .nav-links {
    display: none;
  }

  html[data-design="previous"] .nav-links.active {
    display: flex;
  }

  html[data-design="previous"] .mobile-menu-toggle {
    top: 1.25rem;
    right: 1rem;
  }

  html[data-design="previous"] .table tr {
    border: 1px solid var(--border);
    padding: 0.75rem;
    border-radius: 6px;
  }
}

/* Landscape phone */
@media (max-height: 500px) and (max-width: 900px) {
  .hero {
    padding: 1.5rem 1rem 1rem;
  }

  .hero-short {
    padding: 1.25rem 1rem 1rem;
  }

  .hero-404 {
    padding-top: 2rem;
    padding-bottom: 1.5rem;
  }
}

/* Phone */
@media (max-width: 480px) {
  .hero {
    padding: 2rem 1rem 1.5rem;
  }

  .hero-short {
    padding: 2rem 1rem 1.5rem;
  }

  .hero-404 {
    padding-top: 3rem;
    padding-bottom: 2.5rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .page {
    padding: 0 1rem 2rem;
  }

  .page section + section {
    margin-top: 2rem;
  }

  .feedback {
    margin-top: 1.5rem;
  }

  pre {
    padding: 0.75rem 1rem;
  }

  footer {
    gap: 0.75rem;
  }

  .footer-links {
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
  }

  .footer-links a {
    display: inline-block;
    padding: 0.75rem 0;
  }
}