:root {
  --accent: #4ECDC4;
  --accent-glow: rgba(78, 205, 196, 0.6);
  --accent-subtle: rgba(78, 205, 196, 0.1);
  --accent-dim: rgba(78, 205, 196, 0.3);
  --bg: #0D0D1A;
  --bg-elevated: #15152a;
  --text: #ffffff;
  --text-muted: rgba(255, 255, 255, 0.65);
  --text-dim: rgba(255, 255, 255, 0.45);
  --border: rgba(255, 255, 255, 0.1);
}

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

html, body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.6;
}

body {
  min-height: 100vh;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: opacity 0.2s ease;
}

a:hover {
  opacity: 0.75;
}

.container {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container-wide {
  max-width: 960px;
}

.page {
  padding: 5rem 0 4rem;
}

.page h1 {
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, #44CF6C, #4ECDC4);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page .last-updated {
  color: var(--text-dim);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 2.5rem;
}

.page h2 {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--text);
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.page h3 {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text);
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

.page p,
.page li {
  color: var(--text-muted);
  font-size: 1rem;
  font-weight: 300;
  margin-bottom: 1rem;
}

.page ul,
.page ol {
  padding-left: 1.25rem;
  margin-bottom: 1rem;
}

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

.page .back {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--text-dim);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 3rem;
}

.page .back:hover {
  color: var(--accent);
  opacity: 1;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13, 13, 26, 0.72);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid var(--border);
}

.site-header-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0.9rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.site-header .site-brand { margin-right: auto; }

.app-store-btn {
  display: inline-flex;
  align-items: center;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.app-store-btn img {
  height: 36px;
  width: auto;
  display: block;
}

.app-store-btn:hover {
  opacity: 0.85;
  transform: translateY(-1px);
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  letter-spacing: -0.01em;
  font-size: 1.35rem;
}

.site-brand-icon {
  width: 38px;
  height: 38px;
  display: block;
  border-radius: 9px;
}

.site-brand-mark {
  color: #fff;
}

.site-nav {
  display: flex;
  gap: 1.5rem;
}

.site-nav a {
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: 400;
  letter-spacing: 0.02em;
}

.site-nav a:hover {
  color: var(--accent);
  opacity: 1;
}

@media (max-width: 720px) {
  .site-nav { display: none; }
}

@media (max-width: 520px) {
  .site-header-inner { padding: 0.8rem 1rem; }
  .app-store-btn img { height: 32px; }
}

.site-footer {
  position: relative;
  z-index: 2;
  border-top: 1px solid var(--border);
  padding: 3rem 1.5rem 2rem;
  margin-top: 5rem;
  color: var(--text-dim);
  font-size: 0.9rem;
  background: var(--bg);
}

.site-footer-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 3rem;
  align-items: start;
}

.site-footer-brand {
  display: flex;
  align-items: center;
  gap: 1.1rem;
}

.site-footer-icon {
  width: 72px;
  height: 72px;
  display: block;
  border-radius: 16px;
  flex-shrink: 0;
}

.site-footer-brand-text .site-footer-mark {
  font-weight: 600;
  font-size: 1.35rem;
  color: #fff;
  margin-bottom: 0.25rem;
}

.site-footer-brand p {
  color: var(--text-dim);
  font-weight: 300;
  max-width: 20rem;
}

.site-footer-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(120px, auto));
  gap: 2.5rem;
}

.site-footer-col {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.site-footer-col h4 {
  color: var(--text);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}

.site-footer-col a,
.site-footer a {
  color: var(--text-dim);
  font-size: 0.9rem;
}

.site-footer-col a:hover,
.site-footer a:hover {
  color: var(--accent);
  opacity: 1;
}

.site-footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.8rem;
}

@media (max-width: 640px) {
  .site-footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .site-footer-nav { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
}