@import url('https://fonts.googleapis.com/css2?family=Lexend:wght@300;400;500;600;700&family=Source+Sans+3:wght@300;400;500;600;700&display=swap');

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: 'Lexend', 'Source Sans 3', system-ui, -apple-system, sans-serif;
  background: #fff;
  color: #000;
  line-height: 1.6;
  font-size: 1rem;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; }
ul, ol { list-style: none; }

/* ===== Variables ===== */
:root {
  --black: #000;
  --white: #fff;
  --accent: #000;
  --gap: clamp(1.5rem, 4vw, 3rem);
  --prose-max: 72ch;
  --page-pad: clamp(1rem, 5vw, 4rem);
}

/* ===== Aside / Nav ===== */
.site-aside {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: var(--black);
  color: var(--white);
  display: flex;
  align-items: center;
  padding: 0 var(--page-pad);
  min-height: 56px;
  overflow-x: auto;
}

.site-aside nav ul {
  display: flex;
  flex-wrap: nowrap;
  gap: 0;
  align-items: stretch;
}

.site-aside nav ul li a {
  display: flex;
  align-items: center;
  padding: 0 1rem;
  min-height: 56px;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--white);
  white-space: nowrap;
  transition: background 0.15s;
}

.site-aside nav ul li a:hover {
  background: rgba(255,255,255,0.12);
  text-decoration: none;
}

.aside-related {
  display: none;
}

/* ===== Page wrap offset for fixed aside ===== */
.page-wrap {
  margin-top: 56px;
}

/* ===== Hero (Home) ===== */
.hero-section {
  position: relative;
  width: 100%;
  min-height: 100vh;
  background: var(--black);
  overflow: hidden;
  display: flex;
  align-items: flex-end;
}

.hero-inner {
  position: relative;
  width: 100%;
  min-height: calc(100vh - 56px);
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
}

.hero-media {
  position: absolute;
  inset: 0;
  background: #111;
}

.hero-media--plain {
  background: linear-gradient(135deg, #111 0%, #222 100%);
}

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

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to left, rgba(0,0,0,0.82) 0%, rgba(0,0,0,0.3) 60%, transparent 100%);
}

.hero-copy {
  position: relative;
  z-index: 2;
  text-align: right;
  color: var(--white);
  padding: clamp(2rem, 6vw, 6rem) clamp(1.5rem, 6vw, 6rem);
  max-width: 700px;
}

.hero-badge {
  display: inline-block;
  background: var(--white);
  color: var(--black);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  padding: 0.25rem 0.75rem;
  margin-bottom: 1.5rem;
  text-transform: uppercase;
}

.hero-h1 {
  font-size: clamp(2.2rem, 7vw, 6rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin-bottom: 1.25rem;
  color: var(--white);
}

.hero-lead {
  font-size: clamp(1rem, 2vw, 1.25rem);
  font-weight: 300;
  line-height: 1.6;
  margin-bottom: 2rem;
  opacity: 0.88;
}

.hero-cta {
  display: inline-block;
  background: var(--white);
  color: var(--black);
  font-weight: 700;
  font-size: 1rem;
  padding: 0.85rem 2rem;
  letter-spacing: 0.04em;
  transition: background 0.15s, color 0.15s;
  min-height: 48px;
  line-height: 1.3;
}

.hero-cta:hover {
  background: #e0e0e0;
  text-decoration: none;
}

/* ===== Home Main ===== */
.home-main {
  padding: clamp(3rem, 8vw, 8rem) var(--page-pad);
}

.home-article {}

.home-content-section {
  margin-bottom: clamp(3rem, 6vw, 6rem);
}

.home-children-section {
  padding-top: clamp(2rem, 4vw, 4rem);
  border-top: 3px solid var(--black);
}

/* ===== Guide dl list ===== */
.guide-dl {
  margin-top: 2rem;
}

.guide-dl dt {
  margin-top: 1.75rem;
}

.guide-dl dt a {
  font-size: clamp(1rem, 2vw, 1.15rem);
  font-weight: 700;
  color: var(--black);
  display: block;
  padding: 0.5rem 0;
  border-bottom: 2px solid var(--black);
  transition: opacity 0.12s;
}

.guide-dl dt a:hover {
  opacity: 0.6;
  text-decoration: none;
}

.guide-dl dd {
  font-size: 0.9rem;
  color: #444;
  line-height: 1.7;
  padding: 0.4rem 0 0.2rem;
}

.guide-dl dd time {
  font-size: 0.8rem;
  font-weight: 600;
  color: #888;
}

/* ===== Guide Page ===== */
.guide-hero {
  position: relative;
  background: var(--black);
  color: var(--white);
  min-height: clamp(220px, 40vh, 480px);
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}

.guide-hero-media {
  position: absolute;
  inset: 0;
}

.guide-hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.guide-hero-copy {
  position: relative;
  z-index: 2;
  padding: clamp(2rem, 5vw, 4rem) var(--page-pad);
  max-width: 900px;
}

.guide-eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  background: var(--white);
  color: var(--black);
  padding: 0.2rem 0.6rem;
  margin-bottom: 1rem;
  text-transform: uppercase;
}

.guide-hero-copy h1 {
  font-size: clamp(1.6rem, 4vw, 3.5rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 0.75rem;
  color: var(--white);
}

.guide-meta {
  display: flex;
  gap: 1.5rem;
  font-size: 0.82rem;
  opacity: 0.72;
}

.guide-meta time { font-weight: 600; }

.guide-main {
  padding: clamp(2.5rem, 6vw, 6rem) var(--page-pad);
}

.guide-article {}

.guide-content-section {
  max-width: calc(var(--prose-max) + 2 * var(--page-pad));
}

/* ===== FAQ Page ===== */
.faq-header {
  background: var(--black);
  color: var(--white);
  padding: clamp(3rem, 8vw, 7rem) var(--page-pad) clamp(2rem, 5vw, 4rem);
}

.faq-eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  background: var(--white);
  color: var(--black);
  padding: 0.2rem 0.6rem;
  margin-bottom: 1rem;
  text-transform: uppercase;
}

.faq-header h1 {
  font-size: clamp(1.8rem, 5vw, 4rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.08;
  margin-bottom: 0.75rem;
}

.faq-header time { font-size: 0.82rem; opacity: 0.7; font-weight: 600; }

.faq-main {
  padding: clamp(2.5rem, 6vw, 6rem) var(--page-pad);
}

.faq-article {}
.faq-content-section { margin-bottom: clamp(2rem, 4vw, 4rem); }

.faq-nav-section { border-top: 3px solid var(--black); padding-top: 2rem; }

.faq-more-list { margin-top: 1.25rem; }
.faq-more-list li { border-bottom: 1px solid #e0e0e0; }
.faq-more-list li a {
  display: block;
  padding: 0.8rem 0;
  font-weight: 600;
  font-size: 0.95rem;
  transition: opacity 0.12s;
}
.faq-more-list li a:hover { opacity: 0.55; text-decoration: none; }

/* ===== Changelog Page ===== */
.changelog-header {
  background: var(--black);
  color: var(--white);
  padding: clamp(3rem, 8vw, 7rem) var(--page-pad) clamp(2rem, 5vw, 4rem);
  border-left: 8px solid var(--white);
}

.changelog-eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  background: var(--white);
  color: var(--black);
  padding: 0.2rem 0.6rem;
  margin-bottom: 1rem;
  text-transform: uppercase;
}

.changelog-header h1 {
  font-size: clamp(1.8rem, 5vw, 4rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.08;
  margin-bottom: 0.75rem;
}

.changelog-header time { font-size: 0.82rem; opacity: 0.7; font-weight: 600; }

.changelog-main {
  padding: clamp(2.5rem, 6vw, 6rem) var(--page-pad);
}

.changelog-content-section { margin-bottom: clamp(2rem, 4vw, 4rem); }
.changelog-links-section { border-top: 3px solid var(--black); padding-top: 2rem; }

.changelog-links { margin-top: 1.25rem; }
.changelog-links li { border-bottom: 1px solid #e0e0e0; }
.changelog-links li a {
  display: block;
  padding: 0.8rem 0;
  font-weight: 600;
  font-size: 0.95rem;
  transition: opacity 0.12s;
}
.changelog-links li a:hover { opacity: 0.55; text-decoration: none; }

/* ===== About Page ===== */
.about-header {
  padding: clamp(4rem, 10vw, 10rem) var(--page-pad) clamp(2rem, 5vw, 5rem);
  border-bottom: 3px solid var(--black);
}

.about-logo-wrap { margin-bottom: 2rem; }
.about-logo { height: 40px; width: auto; }
.about-brand-text {
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: -0.04em;
}

.about-eyebrow {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
  color: #555;
}

.about-header h1 {
  font-size: clamp(2rem, 5vw, 5rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.05;
}

.about-main {
  padding: clamp(2.5rem, 6vw, 6rem) var(--page-pad);
}

.about-content-section { margin-bottom: clamp(2rem, 4vw, 4rem); }
.about-nav-section { border-top: 3px solid var(--black); padding-top: 2rem; }

.about-nav-list { margin-top: 1.25rem; }
.about-nav-list li { border-bottom: 1px solid #e0e0e0; }
.about-nav-list li a {
  display: block;
  padding: 0.8rem 0;
  font-weight: 600;
  font-size: 0.95rem;
  transition: opacity 0.12s;
}
.about-nav-list li a:hover { opacity: 0.55; text-decoration: none; }

/* ===== Privacy Page ===== */
.privacy-header {
  padding: clamp(3rem, 8vw, 7rem) var(--page-pad) clamp(2rem, 5vw, 4rem);
  background: #f5f5f5;
  border-bottom: 2px solid var(--black);
}

.privacy-eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  background: var(--black);
  color: var(--white);
  padding: 0.2rem 0.6rem;
  margin-bottom: 1rem;
  text-transform: uppercase;
}

.privacy-header h1 {
  font-size: clamp(1.8rem, 4vw, 3.5rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.1;
}

.privacy-header time { font-size: 0.82rem; color: #666; font-weight: 600; display: block; margin-top: 0.5rem; }

.privacy-main {
  padding: clamp(2.5rem, 6vw, 6rem) var(--page-pad);
}

.privacy-content-section { margin-bottom: clamp(2rem, 4vw, 4rem); }
.privacy-back-section { border-top: 3px solid var(--black); padding-top: 2rem; }

.privacy-back-list { margin-top: 1.25rem; }
.privacy-back-list li { border-bottom: 1px solid #e0e0e0; }
.privacy-back-list li a {
  display: block;
  padding: 0.8rem 0;
  font-weight: 600;
  font-size: 0.95rem;
  transition: opacity 0.12s;
}
.privacy-back-list li a:hover { opacity: 0.55; text-decoration: none; }

/* ===== Prose (shared) ===== */
.prose {
  max-width: var(--prose-max);
  font-size: 1rem;
  line-height: 1.75;
  color: #111;
}

.prose h2 {
  font-size: clamp(1.3rem, 3vw, 2rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  margin-top: 3rem;
  margin-bottom: 0.25rem;
  line-height: 1.15;
}

.prose h2 + hr,
.prose h3 + hr {
  border: none;
  border-top: 2px solid var(--black);
  margin: 0.5rem 0 1.25rem;
}

.prose h3 {
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-top: 2.25rem;
  margin-bottom: 0.25rem;
  line-height: 1.2;
}

.prose p {
  margin-top: 1rem;
  margin-bottom: 0;
}

.prose ul, .prose ol {
  list-style: disc;
  padding-left: 1.5rem;
  margin-top: 1rem;
}

.prose ol { list-style: decimal; }

.prose li {
  margin-bottom: 0.4rem;
}

.prose a {
  color: var(--black);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose a:hover { opacity: 0.55; }

.prose strong { font-weight: 700; }
.prose em { font-style: italic; }

.prose blockquote {
  border-left: 4px solid var(--black);
  padding: 0.75rem 1.25rem;
  margin: 1.5rem 0;
  background: #f5f5f5;
  font-style: italic;
}

.prose code {
  background: #f0f0f0;
  padding: 0.1em 0.35em;
  font-size: 0.88em;
  font-family: 'Source Code Pro', monospace;
}

.prose pre {
  background: #111;
  color: #eee;
  padding: 1.25rem;
  overflow-x: auto;
  font-size: 0.88em;
  margin: 1.5rem 0;
}

.prose pre code { background: none; color: inherit; padding: 0; }

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9rem;
}

.prose th {
  background: var(--black);
  color: var(--white);
  padding: 0.6rem 0.85rem;
  text-align: left;
  font-weight: 700;
}

.prose td {
  padding: 0.55rem 0.85rem;
  border-bottom: 1px solid #ddd;
}

.prose hr {
  border: none;
  border-top: 2px solid var(--black);
  margin: 2.5rem 0;
}

.prose time.pub-date,
.prose time.mod-date {
  font-size: 0.82rem;
  font-weight: 600;
  color: #666;
  display: block;
  margin-bottom: 0.5rem;
}

/* ===== h2+hr outside prose ===== */
h2 + hr {
  border: none;
  border-top: 2px solid var(--black);
  margin: 0.5rem 0 1.5rem;
}

h3 + hr {
  border: none;
  border-top: 1px solid var(--black);
  margin: 0.4rem 0 1.2rem;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--black);
  color: var(--white);
  margin-top: clamp(3rem, 6vw, 6rem);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  padding: clamp(2rem, 5vw, 4rem) var(--page-pad);
  border-bottom: 1px solid rgba(255,255,255,0.12);
}

.footer-dl {
  min-width: 140px;
  flex: 1 1 140px;
}

.footer-dl dt {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  margin-bottom: 0.75rem;
}

.footer-dl dd {
  margin-bottom: 0.45rem;
}

.footer-dl dd a {
  color: rgba(255,255,255,0.85);
  font-size: 0.88rem;
  font-weight: 400;
  display: block;
  padding: 0.1rem 0;
  min-height: 32px;
  line-height: 1.8;
  transition: color 0.12s;
}

.footer-dl dd a:hover {
  color: var(--white);
  text-decoration: none;
}

.footer-bar {
  padding: 1rem var(--page-pad);
  font-size: 0.78rem;
  color: rgba(255,255,255,0.4);
}

/* ===== Scroll Reveal Animation ===== */
@media (prefers-reduced-motion: no-preference) {
  .guide-dl dt,
  .faq-more-list li,
  .changelog-links li,
  .about-nav-list li,
  .privacy-back-list li {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.35s ease, transform 0.35s ease;
  }

  .guide-dl dt.visible,
  .faq-more-list li.visible,
  .changelog-links li.visible,
  .about-nav-list li.visible,
  .privacy-back-list li.visible {
    opacity: 1;
    transform: none;
  }
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .site-aside {
    padding: 0 0.75rem;
    min-height: 52px;
  }

  .site-aside nav ul li a {
    padding: 0 0.65rem;
    font-size: 0.76rem;
    min-height: 52px;
  }

  .page-wrap { margin-top: 52px; }

  .hero-copy {
    text-align: left;
    padding: 2rem 1.25rem;
  }

  .hero-overlay {
    background: rgba(0,0,0,0.65);
  }

  .footer-inner {
    flex-direction: column;
    gap: 1.5rem;
  }

  .guide-meta {
    flex-direction: column;
    gap: 0.25rem;
  }
}

@media (max-width: 480px) {
  .site-aside nav ul {
    gap: 0;
  }

  .site-aside nav ul li a {
    padding: 0 0.5rem;
    font-size: 0.72rem;
  }

  .hero-h1 {
    font-size: clamp(1.8rem, 10vw, 3rem);
  }

  .prose h2 {
    font-size: 1.25rem;
  }
}