/* ── Custom Properties ── */
:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f6f8fa;
  --color-text: #1f2328;
  --color-text-muted: #656d76;
  --color-border: #d0d7de;
  --color-link: #0969da;
  --color-link-hover: #0550ae;
  --color-green: #1a7f37;
  --color-green-bg: #dafbe1;
  --color-red: #cf222e;
  --color-red-bg: #ffebe9;
  --color-gray: #6e7781;
  --color-gray-bg: #eaeef2;
  --color-accent: #0969da;
  --color-accent-bg: #ddf4ff;
  --color-badge-graduated: #1a7f37;
  --color-badge-incubating: #9a6700;
  --color-badge-standard: #0550ae;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --max-width: 960px;
  --radius: 6px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0d1117;
    --color-bg-alt: #161b22;
    --color-text: #e6edf3;
    --color-text-muted: #8b949e;
    --color-border: #30363d;
    --color-link: #58a6ff;
    --color-link-hover: #79c0ff;
    --color-green: #3fb950;
    --color-green-bg: #0d2117;
    --color-red: #f85149;
    --color-red-bg: #2d1214;
    --color-gray: #8b949e;
    --color-gray-bg: #21262d;
    --color-accent: #58a6ff;
    --color-accent-bg: #0d2240;
    --color-badge-graduated: #3fb950;
    --color-badge-incubating: #d29922;
    --color-badge-standard: #58a6ff;
  }
}

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

/* ── Base ── */
html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  color: var(--color-link-hover);
  text-decoration: underline;
}

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--color-bg-alt);
  padding: 0.15em 0.4em;
  border-radius: 3px;
}

/* ── Layout ── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

section {
  padding: 3rem 0;
  border-bottom: 1px solid var(--color-border);
}

section:last-of-type {
  border-bottom: none;
}

/* ── Nav ── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: 0.75rem 0;
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.nav-brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-text);
  text-decoration: none;
}

.nav-brand:hover {
  color: var(--color-text);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 1.25rem;
  list-style: none;
  flex-wrap: wrap;
}

.nav-links a {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

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

/* ── Hero ── */
.hero {
  padding: 4rem 0 3rem;
  text-align: center;
}

.hero h1 {
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 0.75rem;
}

.hero .subtitle {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 640px;
  margin: 0 auto 2rem;
}

.hero .author {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 2rem;
}

.hero .author a {
  color: var(--color-text-muted);
  text-decoration: underline;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
  max-width: 720px;
  margin: 0 auto 2rem;
}

.stat {
  text-align: center;
  padding: 1rem;
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

.stat .number {
  display: block;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-accent);
}

.stat .label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.ui-links {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

.ui-link {
  display: inline-block;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text);
  transition: border-color 0.15s;
}

.ui-link:hover {
  border-color: var(--color-accent);
  text-decoration: none;
  color: var(--color-accent);
}

/* ── Section Headers ── */
.section-header {
  margin-bottom: 1.5rem;
}

.section-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.section-header p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* ── Status ── */
.status-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.status-card {
  padding: 1rem;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.status-card .name {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--color-text-muted);
  margin-bottom: 0.25rem;
}

.status-card .indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.status-dot.up { background: var(--color-green); }
.status-dot.down { background: var(--color-red); }
.status-dot.unknown { background: var(--color-gray); }

.status-card .response-time {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}

.status-message {
  text-align: center;
  padding: 1.5rem;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

.uptime-timeline {
  display: flex;
  gap: 2px;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.uptime-timeline .day {
  width: 8px;
  height: 24px;
  border-radius: 2px;
  position: relative;
  cursor: default;
}

.uptime-timeline .day.full { background: var(--color-green); }
.uptime-timeline .day.partial { background: var(--color-badge-incubating); }
.uptime-timeline .day.down { background: var(--color-red); }
.uptime-timeline .day.empty { background: var(--color-gray-bg); }

.uptime-timeline .day .tooltip {
  display: none;
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 0.35rem 0.5rem;
  font-size: 0.7rem;
  line-height: 1.4;
  white-space: nowrap;
  color: var(--color-text);
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
  z-index: 10;
  pointer-events: none;
}

.uptime-timeline .day:hover .tooltip {
  display: block;
}

.uptime-legend {
  display: flex;
  gap: 1rem;
  margin-top: 0.5rem;
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.uptime-legend span {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.uptime-legend .swatch {
  width: 8px;
  height: 8px;
  border-radius: 2px;
  display: inline-block;
}

/* ── E2E Results ── */
.e2e-summary {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.e2e-card {
  padding: 1.25rem;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.e2e-card h3 {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
}

.e2e-card .result {
  font-size: 1.25rem;
  font-weight: 700;
}

.e2e-card .result.pass { color: var(--color-green); }
.e2e-card .result.fail { color: var(--color-red); }
.e2e-card .result.skipped { color: var(--color-gray); }

.e2e-card .details {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}

.e2e-history {
  display: flex;
  gap: 3px;
  flex-wrap: wrap;
}

.e2e-history .day {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  position: relative;
  cursor: default;
}

.e2e-history .day.pass { background: var(--color-green); }
.e2e-history .day.fail { background: var(--color-red); }
.e2e-history .day.skipped { background: var(--color-gray-bg); }

.e2e-history .day .tooltip {
  display: none;
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 0.35rem 0.5rem;
  font-size: 0.7rem;
  line-height: 1.4;
  white-space: nowrap;
  color: var(--color-text);
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
  z-index: 10;
  pointer-events: none;
}

.e2e-history .day:hover .tooltip {
  display: block;
}

/* ── Screenshots / Live UIs ── */
.ui-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

.ui-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.ui-card .screenshot {
  width: 100%;
  aspect-ratio: 16 / 10;
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.ui-card .screenshot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ui-card .info {
  padding: 1rem;
}

.ui-card .info h3 {
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.ui-card .info p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ── Walkthrough ── */
.walkthrough {
  display: flex;
  gap: 0.75rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
  -webkit-overflow-scrolling: touch;
}

.walkthrough-step {
  flex: 0 0 200px;
}

.walkthrough-img {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: var(--color-bg-alt);
}

.walkthrough-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  cursor: pointer;
}

.walkthrough-label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-align: center;
  margin-top: 0.35rem;
}

/* ── Architecture ── */
.architecture-diagram {
  margin-bottom: 2rem;
  text-align: center;
}

.architecture-diagram img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

.principles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.principle {
  padding: 1rem;
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

.principle h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.principle p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ── Bootstrap Flow ── */
.bootstrap-flow {
  margin-bottom: 2rem;
}

.tier {
  padding: 1rem 1.25rem;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.tier-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.4rem;
}

.tier-header h4 {
  font-size: 1rem;
  font-weight: 600;
}

.tier-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  flex-shrink: 0;
}

.tier p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-left: 2.5rem;
}

.tier-arrow {
  text-align: center;
  font-size: 1.25rem;
  color: var(--color-text-muted);
  padding: 0.25rem 0;
}

/* ── Tables ── */
.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

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

.data-table th,
.data-table td {
  padding: 0.6rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.data-table th {
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--color-text-muted);
  background: var(--color-bg-alt);
}

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

/* ── Roadmap / Phases ── */
.phase-list {
  list-style: none;
}

.phase-list details {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 0.5rem;
}

.phase-list summary {
  padding: 0.75rem 1rem;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.phase-list summary::-webkit-details-marker {
  display: none;
}

.phase-list summary::before {
  content: "+";
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 1.1rem;
  color: var(--color-text-muted);
  width: 1.25rem;
  text-align: center;
  flex-shrink: 0;
}

.phase-list details[open] summary::before {
  content: "-";
}

.phase-list details[open] summary {
  border-bottom: 1px solid var(--color-border);
  border-radius: var(--radius) var(--radius) 0 0;
}

.phase-list .phase-content {
  padding: 0.75rem 1rem 0.75rem 3rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.phase-list .phase-content ul {
  list-style: disc;
  padding-left: 1rem;
}

.phase-list .phase-content li {
  margin-bottom: 0.25rem;
}

.phase-badge {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: 10px;
  text-transform: uppercase;
}

.phase-badge.complete {
  background: var(--color-green-bg);
  color: var(--color-green);
}

.phase-badge.active {
  background: var(--color-accent-bg);
  color: var(--color-accent);
}

/* ── CNCF Grid ── */
.cncf-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.75rem;
}

.cncf-item {
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg-alt);
}

.cncf-item .project-name {
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 0.15rem;
}

.cncf-item .project-role {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.maturity-badge {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  vertical-align: middle;
  margin-left: 0.35rem;
}

.maturity-badge.graduated {
  background: var(--color-green-bg);
  color: var(--color-badge-graduated);
}

.maturity-badge.incubating {
  background: #fff8c5;
  color: var(--color-badge-incubating);
}

@media (prefers-color-scheme: dark) {
  .maturity-badge.incubating {
    background: #2d2200;
  }
}

.maturity-badge.standard {
  background: var(--color-accent-bg);
  color: var(--color-badge-standard);
}

/* ── ADR List ── */
.adr-list {
  list-style: none;
}

.adr-list li {
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.adr-list li:last-child {
  border-bottom: none;
}

.adr-number {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  flex-shrink: 0;
}

/* ── Cost ── */
.cost-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.cost-card {
  padding: 1.25rem;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.cost-card h3 {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
}

.cost-card .amount {
  font-size: 1.5rem;
  font-weight: 700;
}

.cost-card .note {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}

/* ── Footer ── */
.footer {
  padding: 2rem 0;
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-border);
}

.footer a {
  color: var(--color-text-muted);
}

/* ── Lightbox ── */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.85);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.lightbox.active {
  display: flex;
}

.lightbox img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: var(--radius);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

/* ── Responsive ── */
@media (max-width: 640px) {
  .hero h1 {
    font-size: 1.75rem;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .e2e-summary {
    grid-template-columns: 1fr;
  }

  .cost-grid {
    grid-template-columns: 1fr;
  }

  .nav-links {
    display: none;
  }

  section {
    padding: 2rem 0;
  }
}