/* ============================================================
   MicroPython Release Notes — shared stylesheet
   Origin: extracted verbatim from micropython-v1.28/index.html
   Per-release pages add their own bespoke demo CSS on top.
   ============================================================ */

/* ===== CSS Reset & Variables ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', Consolas, monospace;
  --max-width: 900px;
  --sidebar-width: 220px;
  --transition: 0.3s ease;
}

[data-theme="dark"] {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;
  --bg-card: #1c2129;
  --bg-code: #1a1e25;
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #6e7681;
  --accent: #58a6ff;
  --accent-glow: rgba(88, 166, 255, 0.15);
  --accent-green: #3fb950;
  --accent-green-glow: rgba(63, 185, 80, 0.15);
  --accent-orange: #d29922;
  --accent-red: #f85149;
  --accent-purple: #bc8cff;
  --border: #30363d;
  --border-highlight: #58a6ff;
  --shadow: 0 2px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
  --pwm-high: #3fb950;
  --pwm-low: #21262d;
  --pwm-line: #58a6ff;
}

[data-theme="light"] {
  --bg-primary: #ffffff;
  --bg-secondary: #f6f8fa;
  --bg-tertiary: #eaeef2;
  --bg-card: #f6f8fa;
  --bg-code: #f0f3f6;
  --text-primary: #1f2328;
  --text-secondary: #656d76;
  --text-muted: #8b949e;
  --accent: #0969da;
  --accent-glow: rgba(9, 105, 218, 0.1);
  --accent-green: #1a7f37;
  --accent-green-glow: rgba(26, 127, 55, 0.1);
  --accent-orange: #9a6700;
  --accent-red: #cf222e;
  --accent-purple: #8250df;
  --border: #d0d7de;
  --border-highlight: #0969da;
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
  --pwm-high: #1a7f37;
  --pwm-low: #eaeef2;
  --pwm-line: #0969da;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background var(--transition), color var(--transition);
}

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

/* ===== Theme Toggle ===== */
.theme-toggle {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 1000;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  transition: all var(--transition);
  color: var(--text-primary);
}
.theme-toggle:hover { border-color: var(--accent); }

/* ===== Sidebar / TOC ===== */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  padding: 24px 16px;
  overflow-y: auto;
  z-index: 100;
  transition: transform 0.3s ease, background var(--transition);
}

.sidebar-logo {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.sidebar-version {
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 24px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.toc { list-style: none; }
.toc li { margin-bottom: 2px; }
.toc a {
  display: block;
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 13px;
  color: var(--text-secondary);
  transition: all 0.2s ease;
  border-left: 2px solid transparent;
}
.toc a:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
  text-decoration: none;
}
.toc a.active {
  color: var(--accent);
  background: var(--accent-glow);
  border-left-color: var(--accent);
  font-weight: 600;
}
.toc-divider {
  height: 1px;
  background: var(--border);
  margin: 12px 10px;
}

.mobile-menu-btn {
  display: none;
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 1001;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 8px;
  width: 40px;
  height: 40px;
  cursor: pointer;
  color: var(--text-primary);
  font-size: 20px;
  align-items: center;
  justify-content: center;
}

/* ===== Main Content ===== */
.main {
  margin-left: var(--sidebar-width);
  max-width: calc(var(--max-width) + 80px);
  padding: 0 40px;
}

/* ===== Hero Section ===== */
.hero {
  padding: 80px 0 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0; left: -50%; right: -50%; bottom: 0;
  background: radial-gradient(ellipse at 50% 0%, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid var(--accent);
  margin-bottom: 20px;
  animation: pulse-border 3s ease-in-out infinite;
}

@keyframes pulse-border {
  0%, 100% { box-shadow: 0 0 0 0 rgba(88, 166, 255, 0.3); }
  50% { box-shadow: 0 0 0 8px rgba(88, 166, 255, 0); }
}

.hero h1 {
  font-size: 48px;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 12px;
  line-height: 1.1;
}
.hero h1 span { color: var(--accent); }

.hero-tagline {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 16px;
}

.hero-date {
  font-size: 14px;
  color: var(--text-muted);
}

/* ===== Summary Cards ===== */
.summary-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 0 0 16px;
}

.summary-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
}
.summary-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.summary-card .card-icon {
  font-size: 28px;
  margin-bottom: 8px;
  display: block;
}
.summary-card .card-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.summary-card .card-desc {
  font-size: 11px;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* Stats ribbon */
.stats-ribbon {
  display: flex;
  justify-content: center;
  gap: 32px;
  padding: 20px 0 40px;
  flex-wrap: wrap;
}
.stat-item {
  text-align: center;
}
.stat-number {
  font-size: 28px;
  font-weight: 800;
  color: var(--accent);
  display: block;
}
.stat-label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ===== Section Styling ===== */
.section {
  padding: 64px 0;
  border-top: 1px solid var(--border);
}

.section-header {
  margin-bottom: 32px;
}
.section-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  padding: 4px 10px;
  border-radius: 4px;
  margin-bottom: 12px;
}
.section-badge.new {
  color: var(--accent-green);
  background: var(--accent-green-glow);
}
.section-badge.improved {
  color: var(--accent-orange);
  background: rgba(210, 153, 34, 0.15);
}

.section h2 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: -0.5px;
}

.section-desc {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 700px;
  margin-bottom: 24px;
}

/* ===== Code Blocks ===== */
.code-block {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  margin: 16px 0;
  position: relative;
}
.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-muted);
}
.copy-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-muted);
  cursor: pointer;
  padding: 2px 8px;
  font-size: 11px;
  transition: all 0.2s;
}
.copy-btn:hover { color: var(--text-primary); border-color: var(--accent); }
.copy-btn.copied { color: var(--accent-green); border-color: var(--accent-green); }

pre {
  padding: 16px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-primary);
}

/* Syntax highlighting */
.kw { color: var(--accent-purple); font-weight: 600; }
.fn { color: #d2a8ff; }
.str { color: #a5d6ff; }
.num { color: #79c0ff; }
.cmt { color: var(--text-muted); font-style: italic; }
.op { color: var(--accent-red); }
.bi { color: #ffa657; }

[data-theme="light"] .kw { color: #8250df; }
[data-theme="light"] .fn { color: #8250df; }
[data-theme="light"] .str { color: #0a3069; }
[data-theme="light"] .num { color: #0550ae; }
[data-theme="light"] .cmt { color: #6e7781; }
[data-theme="light"] .op { color: #cf222e; }
[data-theme="light"] .bi { color: #953800; }

/* ===== Demo Containers ===== */
.demo-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin: 24px 0;
  box-shadow: var(--shadow);
}
.demo-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent);
  margin-bottom: 16px;
}

/* ===== Generic Buttons ===== */
.btn {
  padding: 8px 18px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid var(--border);
  transition: all 0.2s;
  font-family: var(--font-sans);
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn-primary:hover { opacity: 0.85; }
.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}
.btn-secondary:hover { border-color: var(--accent); }

/* ===== Generic Badges ===== */
.badge {
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-secondary);
}
.badge.active {
  border-color: var(--accent-green);
  color: var(--accent-green);
  background: var(--accent-green-glow);
}
.badge.coming {
  border-color: var(--accent-orange);
  color: var(--accent-orange);
}

/* ===== Callouts ===== */
.callout {
  background: var(--accent-glow);
  border: 1px solid var(--accent);
  border-radius: 8px;
  padding: 16px 20px;
  margin-top: 20px;
  font-size: 14px;
}
.callout-title {
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 4px;
  font-size: 13px;
}

/* ===== Port Matrix ===== */
.port-matrix {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 8px;
  margin-top: 20px;
}
.port-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  transition: all 0.3s ease;
}
.port-chip .check {
  color: var(--accent-green);
  font-weight: bold;
}
.port-chip.new-in-release {
  border-color: var(--accent-green);
  background: var(--accent-green-glow);
  animation: chip-glow 2s ease-in-out 1;
}
@keyframes chip-glow {
  0% { box-shadow: 0 0 0 0 rgba(63, 185, 80, 0.4); }
  50% { box-shadow: 0 0 12px 4px rgba(63, 185, 80, 0.2); }
  100% { box-shadow: 0 0 0 0 rgba(63, 185, 80, 0); }
}

/* ===== Highlights Grid ===== */
.highlights-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.highlight-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  transition: all 0.2s ease;
  cursor: default;
}
.highlight-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow);
}
.highlight-card .hl-icon {
  font-size: 24px;
  margin-bottom: 10px;
  display: block;
}
.highlight-card h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 6px;
}
.highlight-card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}
.highlight-card .hl-ports {
  display: flex;
  gap: 4px;
  margin-top: 10px;
  flex-wrap: wrap;
}
.highlight-card .hl-port-tag {
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 10px;
  font-weight: 600;
  background: var(--bg-tertiary);
  color: var(--text-muted);
  border: 1px solid var(--border);
}

/* ===== By the Numbers ===== */
.numbers-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}
.number-card {
  text-align: center;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.number-card .big-number {
  font-size: 48px;
  font-weight: 800;
  color: var(--accent);
  display: block;
  font-variant-numeric: tabular-nums;
}
.number-card .number-label {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.code-size-chart {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
}
.code-size-chart h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
}

.cs-row {
  display: grid;
  grid-template-columns: 120px 1fr 80px;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}
.cs-row:last-child { border-bottom: none; }
.cs-name {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 12px;
}
.cs-bar-wrap {
  height: 20px;
  position: relative;
  display: flex;
  align-items: center;
}
.cs-bar {
  height: 14px;
  border-radius: 3px;
  transition: width 1s ease;
  position: relative;
}
.cs-bar.positive { background: var(--accent-orange); }
.cs-bar.negative { background: var(--accent-green); }
.cs-value {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  text-align: right;
}
.cs-bar-wrap .cs-tooltip {
  display: none;
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 11px;
  white-space: nowrap;
  z-index: 10;
  box-shadow: var(--shadow);
  color: var(--text-secondary);
  margin-bottom: 4px;
}
.cs-row:hover .cs-tooltip { display: block; }

/* ===== Board Gallery ===== */
.board-gallery {
  margin-top: 16px;
}
.board-port-group {
  margin-bottom: 16px;
}
.board-port-group h4 {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-secondary);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.board-list {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.board-chip {
  padding: 6px 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--text-primary);
  transition: all 0.2s;
}
.board-chip:hover {
  border-color: var(--accent);
  background: var(--accent-glow);
}

/* ===== Footer ===== */
.footer {
  padding: 48px 0;
  border-top: 1px solid var(--border);
  text-align: center;
}
.footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.footer-links a {
  font-size: 14px;
  color: var(--text-secondary);
}
.footer-links a:hover { color: var(--accent); }

.funding {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
  line-height: 1.8;
}
.funding strong { color: var(--text-secondary); }

.contributors-toggle {
  cursor: pointer;
  color: var(--accent);
  font-size: 13px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 16px;
  font-family: var(--font-sans);
  transition: all 0.2s;
}
.contributors-toggle:hover { border-color: var(--accent); }

.contributors-list {
  display: none;
  margin-top: 16px;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 2;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}
.contributors-list.open { display: block; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .mobile-menu-btn { display: flex; }
  .main { margin-left: 0; }
}

@media (max-width: 768px) {
  .hero h1 { font-size: 32px; }
  .summary-cards { grid-template-columns: repeat(2, 1fr); }
  .numbers-grid { grid-template-columns: 1fr; }
  .cs-row { grid-template-columns: 80px 1fr 60px; }
  .main { padding: 0 20px; }
}

@media (max-width: 480px) {
  .summary-cards { grid-template-columns: 1fr; }
  .stats-ribbon { gap: 16px; }
}

/* ===== PyScript Editor Overrides ===== */
.live-playground {
  margin-top: 24px;
}
.live-playground .demo-label {
  display: flex;
  align-items: center;
  gap: 8px;
}
.live-playground .demo-label .pyscript-tag {
  font-size: 9px;
  padding: 2px 6px;
  border-radius: 3px;
  background: var(--accent-green-glow);
  color: var(--accent-green);
  border: 1px solid var(--accent-green);
  font-weight: 700;
  letter-spacing: 0.5px;
}
.playground-intro {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.6;
}
.playground-group {
  margin-bottom: 24px;
}
.playground-group h4 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}
.playground-note {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 8px;
  font-style: italic;
}

/* Live editor + output panels */
.mpy-code-editor {
  width: 100%;
  min-height: 120px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 8px 8px 0 0;
  background: var(--bg-code);
  color: var(--text-primary);
  tab-size: 4;
  resize: vertical;
  outline: none;
  display: block;
}
.mpy-code-editor:focus {
  border-color: var(--accent);
}
.mpy-btn-row {
  display: flex;
  gap: 6px;
  padding: 8px 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 8px 8px;
  align-items: center;
}
.mpy-btn-row .mpy-run-btn {
  padding: 5px 16px;
  font-size: 12px;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  border: none;
  border-radius: 4px;
  background: var(--accent-green);
  color: #fff;
  transition: opacity 0.2s;
}
.mpy-btn-row .mpy-run-btn:hover { opacity: 0.85; }
.mpy-btn-row .mpy-clear-btn {
  padding: 5px 12px;
  font-size: 12px;
  font-family: var(--font-sans);
  cursor: pointer;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: transparent;
  color: var(--text-secondary);
  transition: all 0.2s;
}
.mpy-btn-row .mpy-clear-btn:hover { border-color: var(--accent); color: var(--text-primary); }
.mpy-btn-row .mpy-status {
  margin-left: auto;
  font-size: 11px;
  color: var(--text-muted);
}
.mpy-output {
  margin-top: 8px;
  padding: 12px;
  min-height: 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  background: var(--bg-code);
  color: var(--accent-green);
  border: 1px solid var(--border);
  border-radius: 8px;
  white-space: pre-wrap;
  word-break: break-word;
}
.mpy-output:empty { display: none; }
.mpy-output.has-error { color: var(--accent-red); }

.mpy-banner {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.mpy-banner-icon {
  font-size: 32px;
  flex-shrink: 0;
}
.mpy-banner-text {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
}
.mpy-banner-text strong {
  color: var(--text-primary);
}
.mpy-banner-text code {
  background: var(--bg-tertiary);
  padding: 1px 5px;
  border-radius: 3px;
  font-size: 12px;
}

/* ===== Port Tier Chart =====
   Originally lifted from the v1.27 release-notes page; reusable on the
   /releases/ index as a "browse by port" navigation widget. */
.tier-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}
.tier-legend-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all 0.2s;
}
.tier-legend-btn:hover {
  border-color: var(--accent);
  color: var(--text-primary);
}
.tier-legend-btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.tier-legend-btn.active .tier-swatch {
  border-color: rgba(255, 255, 255, 0.35);
}

.tier-swatch {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 3px;
  border: 1px solid var(--border);
}
.tier-swatch.tier-1 { background: var(--accent-green); }
.tier-swatch.tier-2 { background: var(--accent); }
.tier-swatch.tier-3 { background: var(--accent-orange); }
.tier-swatch.tier-M { background: var(--text-muted); }

.tier-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 10px;
  margin-bottom: 20px;
}
.tier-node {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  border-left-width: 4px;
  transition: all 0.3s ease;
  position: relative;
}
.tier-node.tier-1 { border-left-color: var(--accent-green); }
.tier-node.tier-2 { border-left-color: var(--accent); }
.tier-node.tier-3 { border-left-color: var(--accent-orange); }
.tier-node.tier-M { border-left-color: var(--text-muted); }
.tier-node.dimmed { opacity: 0.18; }
.tier-node[data-vendor="true"]::after {
  content: "*";
  position: absolute;
  top: 8px;
  right: 10px;
  color: var(--accent-orange);
  font-weight: 700;
}

.tier-node-name {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.tier-node-target {
  font-size: 11px;
  color: var(--text-secondary);
  line-height: 1.4;
  min-height: 28px;
}
.tier-node-tag {
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-top: 8px;
  font-weight: 700;
}

/* Release-version chips on each port node (used on /releases/ index) */
.tier-node-releases {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--border);
}
.tier-release-chip {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.15s;
}
.tier-release-chip:hover {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}
.tier-release-chip.unbuilt {
  cursor: not-allowed;
  opacity: 0.55;
}
.tier-release-chip.unbuilt:hover {
  border-color: var(--border);
  color: var(--text-secondary);
}

.tier-summary {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  padding: 16px;
  background: var(--bg-tertiary);
  border-radius: 8px;
  font-size: 13px;
  color: var(--text-secondary);
}
.tier-summary strong {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 18px;
  margin-right: 4px;
}
.tier-summary-total {
  border-left: 1px solid var(--border);
  padding-left: 24px;
}
.tier-summary-total strong {
  color: var(--text-primary);
}

.tier-note {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 16px;
  font-style: italic;
}