:root {
  --bg: #0d1117;
  --bg-elevated: #12161d;
  --surface: #161b22;
  --surface-hover: #1c2129;
  --border: #30363d;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --accent: #58a6ff;
  --accent-soft: rgba(88, 166, 255, 0.12);
  --amber: #d29922;
  --amber-soft: rgba(210, 153, 34, 0.14);
  --green: #3fb950;
  --green-soft: rgba(63, 185, 80, 0.14);
  --red: #f85149;

  --radius: 12px;
  --gap: 1rem;

  --safe-t: env(safe-area-inset-top, 0px);
  --safe-r: env(safe-area-inset-right, 0px);
  --safe-b: env(safe-area-inset-bottom, 0px);
  --safe-l: env(safe-area-inset-left, 0px);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  min-height: 100dvh;
}

.page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.5rem calc(1.25rem + var(--safe-r)) calc(2rem + var(--safe-b)) calc(1.25rem + var(--safe-l));
}

/* Nav */

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  row-gap: 0.6rem;
  column-gap: 1rem;
  padding: calc(0.75rem + var(--safe-t)) calc(1.25rem + var(--safe-r)) 0.75rem calc(1.25rem + var(--safe-l));
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  flex-shrink: 0;
  order: 1;
}

.nav-logo {
  font-size: 1.1rem;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-shrink: 0;
  margin-left: auto;
  order: 2;
}

.nav-links {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  scrollbar-width: none;
  flex: 1;
  order: 3;
  min-width: 0;
}

.nav-links::-webkit-scrollbar {
  display: none;
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  white-space: nowrap;
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  transition: color 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
}

.nav-links a:hover,
.nav-links a:active {
  color: var(--text);
  background: var(--surface-hover);
  border-color: var(--accent);
}

.signin-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  background: var(--accent);
  color: #08141f;
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition: filter 0.15s ease;
}

.signin-btn:hover,
.signin-btn:active {
  filter: brightness(1.1);
}

.signin-btn[hidden] {
  display: none;
}

@media (max-width: 720px) {
  .nav-links {
    flex-basis: 100%;
    order: 4;
  }
}

/* Hero */

.hero {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 2rem 0 1rem;
}

.hero-text {
  flex: 1;
  min-width: 0;
}

.hero-text h1 {
  margin: 0;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.subtitle {
  margin: 0.4rem 0 0;
  color: var(--text-muted);
  font-size: 1rem;
}

.hero-meta {
  margin: 1rem 0 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.hero-art {
  flex: 1;
  max-width: 420px;
  min-width: 0;
}

.hero-svg {
  width: 100%;
  height: auto;
  display: block;
}

.hero-led {
  animation: led-pulse 2.4s ease-in-out infinite;
}

.hero-packet {
  animation: packet-fade 2.6s ease-in-out infinite;
}

@keyframes led-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

@keyframes packet-fade {
  0%, 100% { opacity: 0; }
  50% { opacity: 1; }
}

@media (max-width: 720px) {
  .hero {
    flex-direction: column-reverse;
    text-align: center;
    padding-top: 1.25rem;
  }
  .hero-art {
    max-width: 280px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero-led, .hero-packet {
    animation: none;
  }
}

.auth-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  font-size: 0.85rem;
  color: var(--text-muted);
  white-space: nowrap;
  flex-shrink: 0;
}

.auth-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
  flex-shrink: 0;
}

.auth-badge[data-state="in"] {
  border-color: rgba(63, 185, 80, 0.35);
  background: var(--green-soft);
  color: var(--green);
}
.auth-badge[data-state="in"] .auth-dot { background: var(--green); }

.auth-badge[data-state="out"] {
  border-color: rgba(210, 153, 34, 0.35);
  background: var(--amber-soft);
  color: var(--amber);
}
.auth-badge[data-state="out"] .auth-dot { background: var(--amber); }

.auth-badge[data-state="unknown"] {
  border-color: rgba(248, 81, 73, 0.3);
  background: rgba(248, 81, 73, 0.08);
  color: var(--red);
}
.auth-badge[data-state="unknown"] .auth-dot { background: var(--red); }

.group {
  margin-bottom: 2rem;
}

.group h2 {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin: 0 0 0.75rem;
}

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

.card {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  color: inherit;
  text-decoration: none;
  transition: background-color 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
  position: relative;
  min-height: 44px;
}

.card:hover, .card:focus-visible {
  background: var(--surface-hover);
  border-color: var(--accent);
  outline: none;
}

.card:active {
  transform: scale(0.98);
}

.card-icon {
  font-size: 1.6rem;
  line-height: 1;
  flex-shrink: 0;
  width: 2.25rem;
  height: 2.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: var(--bg-elevated);
}

.card-body {
  min-width: 0;
  flex: 1;
}

.card-name {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
  font-size: 0.98rem;
}

.card-desc {
  margin: 0.2rem 0 0;
  color: var(--text-muted);
  font-size: 0.85rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.lock {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.1rem;
  height: 1.1rem;
  flex-shrink: 0;
  opacity: 0.85;
}

.lock svg {
  width: 100%;
  height: 100%;
}

.card[data-privileged="true"][data-auth="out"] .lock { color: var(--amber); }
.card[data-privileged="true"][data-auth="in"] .lock { color: var(--green); }
.card[data-privileged="true"][data-auth="checking"] .lock { color: var(--text-muted); }
.card[data-privileged="true"][data-auth="unknown"] .lock { color: var(--red); }

.status-dot {
  position: absolute;
  top: 0.7rem;
  right: 0.7rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
  flex-shrink: 0;
}

.status-dot[data-status="checking"] {
  animation: status-pulse 1.4s ease-in-out infinite;
}

.status-dot[data-status="up"] {
  background: var(--green);
  box-shadow: 0 0 0 3px var(--green-soft);
}

.status-dot[data-status="down"] {
  background: var(--red);
  box-shadow: 0 0 0 3px rgba(248, 81, 73, 0.14);
}

.status-dot[data-status="unknown"] {
  background: var(--text-muted);
  box-shadow: 0 0 0 3px rgba(139, 148, 158, 0.14);
}

@keyframes status-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.footer {
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.footer-copy {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.8rem;
}

.footer-notes {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  color: var(--text-muted);
  font-size: 0.8rem;
}

@media (max-width: 480px) {
  .card-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  }
  .card-desc {
    display: none;
  }
}