/* ──────────────────────────────────────────────────────────────────────────
   SlatePhone Zero — Firmware & Release Portal Theme
   Matches slatephone.com design system and typography tokens.
   ────────────────────────────────────────────────────────────────────────── */

:root,
:root[data-theme="dark"] {
  --bg: #1e2530;
  --surface: #252d38;
  --surface2: #2c3542;
  --border: #384150;
  --border-light: #475569;
  --text: #e8ecf1;
  --text-dim: #a9b6c6;
  --text-muted: #7d8b9d;
  --accent: #5b9bd5;
  --accent-dim: rgba(91, 155, 213, 0.12);
  --on-accent: #16202c;
  --nav-bg: rgba(30, 37, 48, 0.85);
  --error: #f87171;
  --error-bg: rgba(248, 113, 113, 0.10);
  --success: #4ade80;
  --success-bg: rgba(74, 222, 128, 0.10);
  --overlay: rgba(0, 0, 0, 0.65);
  color-scheme: dark;
}

:root[data-theme="light"] {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --surface2: #eef1f6;
  --border: #d5dce6;
  --border-light: #b3bfcf;
  --text: #16202c;
  --text-dim: #495767;
  --text-muted: #5c6a80;
  --accent: #2a6bab;
  --accent-dim: rgba(42, 107, 171, 0.10);
  --on-accent: #ffffff;
  --nav-bg: rgba(247, 248, 250, 0.88);
  --error: #c62b2b;
  --error-bg: rgba(198, 43, 43, 0.07);
  --success: #15803d;
  --success-bg: rgba(21, 128, 61, 0.07);
  --overlay: rgba(22, 32, 44, 0.45);
  color-scheme: light;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    --bg: #f7f8fa;
    --surface: #ffffff;
    --surface2: #eef1f6;
    --border: #d5dce6;
    --border-light: #b3bfcf;
    --text: #16202c;
    --text-dim: #495767;
    --text-muted: #5c6a80;
    --accent: #2a6bab;
    --accent-dim: rgba(42, 107, 171, 0.10);
    --on-accent: #ffffff;
    --nav-bg: rgba(247, 248, 250, 0.88);
    --error: #c62b2b;
    --error-bg: rgba(198, 43, 43, 0.07);
    --success: #15803d;
    --success-bg: rgba(21, 128, 61, 0.07);
    --overlay: rgba(22, 32, 44, 0.45);
    color-scheme: light;
  }
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'DM Mono', monospace;
  background: var(--bg);
  color: var(--text);
  font-size: 13px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── Nav ── */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 20px 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-brand {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1.4rem;
  letter-spacing: 0.06em;
  color: var(--text);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-brand .brand-tag {
  font-family: 'DM Mono', monospace;
  font-size: 0.65rem;
  padding: 2px 6px;
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid var(--border-light);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  gap: 28px;
  align-items: center;
}

.nav-links a {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.15s;
}

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

.nav-cta {
  padding: 8px 20px !important;
  background: var(--accent) !important;
  color: var(--on-accent) !important;
  font-family: 'Bebas Neue', sans-serif !important;
  font-size: 0.85rem !important;
  letter-spacing: 0.06em !important;
  text-transform: uppercase;
  text-decoration: none;
  transition: opacity 0.15s;
}

.nav-cta:hover {
  opacity: 0.85;
}

/* ── Theme Toggle Button ── */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--border-light);
  border-radius: 0;
  color: var(--text-dim);
  cursor: pointer;
  flex-shrink: 0;
  transition: color 0.15s, border-color 0.15s;
}

.theme-toggle:hover {
  color: var(--text);
  border-color: var(--text-dim);
}

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

.theme-toggle svg {
  width: 15px;
  height: 15px;
  display: block;
}

.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }

:root[data-theme="light"] .theme-toggle .icon-sun { display: none; }
:root[data-theme="light"] .theme-toggle .icon-moon { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .theme-toggle .icon-sun { display: block; }
  :root:not([data-theme]) .theme-toggle .icon-moon { display: none; }
}

/* ── Hero / Page Header ── */
.hero {
  padding: 130px 32px 50px;
}

.hero-inner {
  max-width: 960px;
  margin: 0 auto;
  width: 100%;
}

.hero-label {
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.hero-label .hl {
  color: var(--accent);
}

.hero h1 {
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(3rem, 7vw, 5.5rem);
  letter-spacing: 0.04em;
  line-height: 0.95;
  margin-bottom: 20px;
}

.hero h1 .thin {
  font-weight: 400;
  color: var(--text-dim);
}

.hero-sub {
  font-size: 0.95rem;
  font-weight: 300;
  color: var(--text-dim);
  max-width: 600px;
  line-height: 1.7;
  margin-bottom: 32px;
}

/* ── Stats Bar ── */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  margin-top: 24px;
}

.stat-box {
  background: var(--surface);
  padding: 24px 28px;
}

.stat-box .label {
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.stat-box .val {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 2.2rem;
  letter-spacing: 0.04em;
  color: var(--text);
  line-height: 1;
}

.stat-box .val.accent {
  color: var(--accent);
}

.stat-box .desc {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 6px;
}

/* ── Stripe ── */
.stripe {
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent) 30%, transparent 100%);
  margin: 40px 0;
}

/* ── Section Shared ── */
.section {
  max-width: 960px;
  margin: 0 auto;
  padding: 40px 32px 80px;
}

.section-label {
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}

.section h2 {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 2.4rem;
  letter-spacing: 0.04em;
  line-height: 1;
  margin-bottom: 16px;
}

.section-text {
  font-size: 0.85rem;
  color: var(--text-dim);
  max-width: 620px;
  line-height: 1.7;
  margin-bottom: 32px;
}

/* ── Table Card ── */
.table-card {
  border: 1px solid var(--border);
  background: var(--surface);
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.8rem;
}

.data-table th {
  padding: 16px 20px;
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  background: var(--surface2);
}

.data-table td {
  padding: 18px 20px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  vertical-align: middle;
}

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

.data-table tr:hover td {
  background: var(--surface2);
}

.device-badge {
  font-family: 'DM Mono', monospace;
  font-size: 0.75rem;
  padding: 3px 8px;
  background: var(--surface2);
  border: 1px solid var(--border-light);
  color: var(--text);
  font-weight: 500;
}

.channel-tag {
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 0;
  font-weight: 500;
}

.channel-tag.stable {
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid var(--success);
}

.channel-tag.beta {
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid var(--accent);
}

.hash-code {
  font-family: 'DM Mono', monospace;
  font-size: 0.75rem;
  background: var(--bg);
  padding: 4px 8px;
  border: 1px solid var(--border);
  color: var(--text-dim);
  user-select: all;
}

.btn-download {
  display: inline-block;
  padding: 8px 18px;
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  background: var(--accent);
  color: var(--on-accent);
  text-decoration: none;
  transition: opacity 0.15s;
  white-space: nowrap;
}

.btn-download:hover {
  opacity: 0.85;
}

.empty-state {
  padding: 48px 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ── Verification Notice ── */
.notice-box {
  margin-top: 32px;
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 24px 28px;
}

.notice-box h3 {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1.2rem;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
  color: var(--text);
}

.notice-box p {
  font-size: 0.8rem;
  color: var(--text-dim);
  line-height: 1.7;
}

/* ── Footer ── */
footer {
  border-top: 1px solid var(--border);
  padding: 48px 32px 32px;
  max-width: 960px;
  margin: 40px auto 0;
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 32px;
  flex-wrap: wrap;
}

.footer-col {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.8;
}

.footer-col .label {
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.footer-col a {
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.15s;
}

.footer-col a:hover {
  color: var(--accent);
}

.footer-bottom {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  nav { padding: 16px 20px; }
  .nav-links { gap: 16px; }
  .nav-links a:not(.nav-cta) { display: none; }
  .hero { padding: 100px 20px 40px; }
  .hero h1 { font-size: clamp(2.6rem, 10vw, 4rem); }
  .stats-bar { grid-template-columns: 1fr; }
  .section { padding: 32px 20px 60px; }
  .section h2 { font-size: 2rem; }
  .footer-grid { flex-direction: column; gap: 20px; }
  footer { padding: 32px 20px; }
}