/* ============================================================================
   TruthVouch Sentinel Agent — Releases Page Stylesheet
   Served at releases.truthvouch.ai
   Dark theme matching TruthVouch brand colors.
   ============================================================================ */

/* ── Reset & Base ─────────────────────────────────────────────────────────── */

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

:root {
  /* Brand colors */
  --tv-bg-page: #0f1117;
  --tv-bg-card: #161b26;
  --tv-bg-card-hover: #1d2333;
  --tv-bg-code: #0a0d14;
  --tv-border: rgba(255, 255, 255, 0.08);
  --tv-border-accent: rgba(79, 209, 197, 0.3);
  --tv-text-primary: #f0f4f8;
  --tv-text-secondary: #8b98a8;
  --tv-text-muted: #5a6578;
  --tv-accent: #4fd1c5;
  --tv-accent-dark: #2c7a7b;
  --tv-accent-glow: rgba(79, 209, 197, 0.15);
  --tv-success: #48bb78;
  --tv-warning: #f6ad55;
  --tv-radius-sm: 6px;
  --tv-radius-md: 10px;
  --tv-radius-lg: 14px;
  --tv-shadow-card: 0 2px 16px rgba(0, 0, 0, 0.4);
  --tv-shadow-button: 0 2px 8px rgba(79, 209, 197, 0.25);
  --tv-font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --tv-font-mono: 'SFMono-Regular', 'Consolas', 'Liberation Mono', 'Menlo', monospace;
}

body {
  font-family: var(--tv-font);
  background-color: var(--tv-bg-page);
  color: var(--tv-text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--tv-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* ── Layout ───────────────────────────────────────────────────────────────── */

.page-wrapper {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Header / Navbar ──────────────────────────────────────────────────────── */

.site-header {
  background: rgba(15, 17, 23, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--tv-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 700;
  color: var(--tv-text-primary);
  text-decoration: none;
}

.logo-icon {
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, var(--tv-accent), var(--tv-accent-dark));
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

.logo:hover {
  text-decoration: none;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.header-nav a {
  font-size: 14px;
  color: var(--tv-text-secondary);
  transition: color 0.15s;
}

.header-nav a:hover {
  color: var(--tv-text-primary);
  text-decoration: none;
}

/* ── Hero ─────────────────────────────────────────────────────────────────── */

.hero {
  padding: 64px 0 48px;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--tv-accent-glow);
  border: 1px solid var(--tv-border-accent);
  border-radius: 20px;
  padding: 4px 14px;
  font-size: 12px;
  font-weight: 600;
  color: var(--tv-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 20px;
}

.hero-title {
  font-size: 40px;
  font-weight: 800;
  color: var(--tv-text-primary);
  margin-bottom: 12px;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 16px;
  color: var(--tv-text-secondary);
  max-width: 520px;
  margin: 0 auto 32px;
}

/* ── Latest Version Banner ────────────────────────────────────────────────── */

.latest-banner {
  background: var(--tv-bg-card);
  border: 1px solid var(--tv-border);
  border-top: 3px solid var(--tv-accent);
  border-radius: var(--tv-radius-lg);
  padding: 20px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 40px;
}

.latest-version {
  display: flex;
  align-items: center;
  gap: 12px;
}

.latest-label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--tv-text-muted);
}

.latest-version-number {
  font-size: 28px;
  font-weight: 800;
  color: var(--tv-accent);
  font-variant-numeric: tabular-nums;
}

.latest-date {
  font-size: 13px;
  color: var(--tv-text-secondary);
}

.release-notes-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--tv-accent);
  border: 1px solid var(--tv-border-accent);
  border-radius: var(--tv-radius-sm);
  padding: 6px 14px;
  transition: background 0.15s;
}

.release-notes-link:hover {
  background: var(--tv-accent-glow);
  text-decoration: none;
}

/* ── Section Headings ─────────────────────────────────────────────────────── */

.section {
  margin-bottom: 48px;
}

.section-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--tv-text-primary);
  margin-bottom: 6px;
}

.section-subtitle {
  font-size: 14px;
  color: var(--tv-text-secondary);
  margin-bottom: 24px;
}

/* ── Download Cards Grid ──────────────────────────────────────────────────── */

.platform-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.platform-card {
  background: var(--tv-bg-card);
  border: 1px solid var(--tv-border);
  border-radius: var(--tv-radius-lg);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
  position: relative;
  overflow: hidden;
}

.platform-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--tv-accent), var(--tv-accent-dark));
  opacity: 0;
  transition: opacity 0.2s;
}

.platform-card:hover {
  border-color: var(--tv-border-accent);
  box-shadow: var(--tv-shadow-card), 0 0 0 1px var(--tv-border-accent);
  background: var(--tv-bg-card-hover);
}

.platform-card:hover::before {
  opacity: 1;
}

.platform-icon {
  font-size: 36px;
  line-height: 1;
}

.platform-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--tv-text-primary);
}

.platform-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.platform-filename {
  font-size: 12px;
  font-family: var(--tv-font-mono);
  color: var(--tv-text-muted);
}

.platform-size {
  font-size: 12px;
  color: var(--tv-text-muted);
}

.platform-checksum {
  font-size: 11px;
  font-family: var(--tv-font-mono);
  color: var(--tv-text-muted);
  word-break: break-all;
  background: var(--tv-bg-code);
  border-radius: var(--tv-radius-sm);
  padding: 6px 8px;
  border: 1px solid var(--tv-border);
}

.checksum-label {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--tv-text-muted);
  display: block;
  margin-bottom: 3px;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--tv-accent), var(--tv-accent-dark));
  color: #0f1117;
  font-size: 14px;
  font-weight: 700;
  border: none;
  border-radius: var(--tv-radius-md);
  padding: 10px 16px;
  cursor: pointer;
  text-decoration: none;
  transition: opacity 0.15s, box-shadow 0.15s;
  box-shadow: var(--tv-shadow-button);
}

.download-btn:hover {
  opacity: 0.92;
  box-shadow: 0 4px 16px rgba(79, 209, 197, 0.4);
  text-decoration: none;
}

.download-icon {
  font-size: 16px;
}

/* ── GPG Section ──────────────────────────────────────────────────────────── */

.gpg-card {
  background: var(--tv-bg-card);
  border: 1px solid var(--tv-border);
  border-radius: var(--tv-radius-lg);
  padding: 24px;
}

.gpg-fingerprint {
  font-family: var(--tv-font-mono);
  font-size: 13px;
  color: var(--tv-accent);
  background: var(--tv-bg-code);
  border: 1px solid var(--tv-border);
  border-radius: var(--tv-radius-sm);
  padding: 10px 14px;
  margin: 12px 0;
  word-break: break-all;
  letter-spacing: 0.04em;
}

.gpg-commands {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 16px;
}

.code-block {
  background: var(--tv-bg-code);
  border: 1px solid var(--tv-border);
  border-radius: var(--tv-radius-sm);
  padding: 10px 14px;
  font-family: var(--tv-font-mono);
  font-size: 13px;
  color: var(--tv-text-primary);
  overflow-x: auto;
  white-space: pre;
}

.code-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--tv-text-muted);
  display: block;
  margin-bottom: 4px;
}

/* ── Supply Chain Verification ────────────────────────────────────────────── */

.supply-chain-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.supply-chain-card {
  background: var(--tv-bg-card);
  border: 1px solid var(--tv-border);
  border-radius: var(--tv-radius-lg);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
  position: relative;
  overflow: hidden;
}

.supply-chain-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--tv-accent), var(--tv-accent-dark));
  opacity: 0;
  transition: opacity 0.2s;
}

.supply-chain-card:hover {
  border-color: var(--tv-border-accent);
  box-shadow: var(--tv-shadow-card), 0 0 0 1px var(--tv-border-accent);
  background: var(--tv-bg-card-hover);
}

.supply-chain-card:hover::before {
  opacity: 1;
}

.supply-chain-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
}

.supply-chain-icon {
  font-size: 28px;
  line-height: 1;
  flex-shrink: 0;
}

.supply-chain-card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--tv-text-primary);
}

.supply-chain-card-desc {
  font-size: 13px;
  color: var(--tv-text-secondary);
  line-height: 1.55;
  flex-grow: 1;
}

.supply-chain-downloads {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.download-btn--secondary {
  background: transparent;
  color: var(--tv-accent);
  border: 1px solid var(--tv-border-accent);
  box-shadow: none;
}

.download-btn--secondary:hover {
  background: var(--tv-accent-glow);
  opacity: 1;
  box-shadow: none;
  color: var(--tv-accent);
}

.supply-chain-docs-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--tv-accent);
  margin-top: auto;
}

.supply-chain-docs-link:hover {
  text-decoration: underline;
}

.compliance-callout {
  background: var(--tv-bg-card);
  border: 1px solid var(--tv-border);
  border-left: 3px solid var(--tv-accent);
  border-radius: var(--tv-radius-md);
  padding: 16px 20px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  flex-wrap: wrap;
}

.compliance-callout-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--tv-accent);
  white-space: nowrap;
  padding-top: 2px;
  flex-shrink: 0;
}

.compliance-callout-text {
  font-size: 13px;
  color: var(--tv-text-secondary);
  line-height: 1.55;
}

.compliance-callout-text strong {
  color: var(--tv-text-primary);
  font-weight: 600;
}

.compliance-callout-text a {
  margin-left: 6px;
  font-weight: 600;
}

/* ── Accordion (Previous Versions) ───────────────────────────────────────── */

.accordion {
  border: 1px solid var(--tv-border);
  border-radius: var(--tv-radius-lg);
  overflow: hidden;
}

.accordion-item {
  border-bottom: 1px solid var(--tv-border);
}

.accordion-item:last-child {
  border-bottom: none;
}

.accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: var(--tv-bg-card);
  border: none;
  cursor: pointer;
  color: var(--tv-text-primary);
  font-size: 14px;
  font-weight: 600;
  text-align: left;
  gap: 12px;
  transition: background 0.15s;
}

.accordion-trigger:hover {
  background: var(--tv-bg-card-hover);
}

.accordion-trigger[aria-expanded="true"] {
  color: var(--tv-accent);
}

.accordion-chevron {
  font-size: 12px;
  color: var(--tv-text-muted);
  transition: transform 0.2s;
  flex-shrink: 0;
}

.accordion-trigger[aria-expanded="true"] .accordion-chevron {
  transform: rotate(180deg);
}

.accordion-body {
  background: var(--tv-bg-page);
  padding: 20px 24px;
  display: none;
}

.accordion-body.open {
  display: block;
}

.version-table {
  width: 100%;
  border-collapse: collapse;
}

.version-table th,
.version-table td {
  padding: 10px 12px;
  text-align: left;
  font-size: 13px;
  border-bottom: 1px solid var(--tv-border);
}

.version-table th {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--tv-text-muted);
}

.version-table td {
  color: var(--tv-text-primary);
}

.version-table a {
  font-size: 13px;
}

/* ── System Requirements ─────────────────────────────────────────────────── */

.requirements-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}

.req-card {
  background: var(--tv-bg-card);
  border: 1px solid var(--tv-border);
  border-radius: var(--tv-radius-md);
  padding: 20px;
}

.req-platform {
  font-size: 15px;
  font-weight: 700;
  color: var(--tv-text-primary);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.req-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.req-list li {
  font-size: 13px;
  color: var(--tv-text-secondary);
  padding-left: 16px;
  position: relative;
}

.req-list li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--tv-accent);
}

/* ── Footer ───────────────────────────────────────────────────────────────── */

.site-footer {
  border-top: 1px solid var(--tv-border);
  margin-top: 48px;
  padding: 32px 0;
}

.footer-inner {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-copy {
  font-size: 13px;
  color: var(--tv-text-muted);
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  font-size: 13px;
  color: var(--tv-text-muted);
  transition: color 0.15s;
}

.footer-links a:hover {
  color: var(--tv-text-secondary);
  text-decoration: none;
}

/* ── Loading Skeleton ─────────────────────────────────────────────────────── */

.skeleton {
  background: linear-gradient(90deg, var(--tv-border) 25%, rgba(255,255,255,0.05) 50%, var(--tv-border) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 4px;
  display: inline-block;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ── Utilities ────────────────────────────────────────────────────────────── */

.text-accent { color: var(--tv-accent); }
.text-muted { color: var(--tv-text-muted); }
.text-secondary { color: var(--tv-text-secondary); }

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--tv-success);
  box-shadow: 0 0 6px var(--tv-success);
  vertical-align: middle;
  margin-right: 6px;
}

/* ── Responsive ───────────────────────────────────────────────────────────── */

@media (max-width: 640px) {
  .hero-title { font-size: 28px; }
  .platform-grid { grid-template-columns: 1fr 1fr; }
  .latest-banner { flex-direction: column; align-items: flex-start; }
  .header-nav { display: none; }
  .requirements-grid { grid-template-columns: 1fr; }
  .supply-chain-grid { grid-template-columns: 1fr; }
  .compliance-callout { flex-direction: column; gap: 8px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 400px) {
  .platform-grid { grid-template-columns: 1fr; }
}