/* Reusable long-form article style (light theme) */
*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --article-bg: #f6f8fb;
  --article-surface: #ffffff;
  --article-surface-2: #f8fafc;
  --article-border: #e5e7eb;
  --article-accent: #2563eb;
  --article-accent-2: #7c3aed;
  --article-accent-3: #b45309;
  --article-text: #111827;
  --article-muted: #6b7280;
  --article-code-bg: #0f172a;
  --article-code-border: #1e293b;
  --article-green: #15803d;
  --article-red: #b91c1c;
  --article-sidebar: 260px;
}

html { scroll-behavior: smooth; }

body.article-page {
  background: var(--article-bg);
  color: var(--article-text);
  min-height: 100vh;
  overflow-x: hidden;
}

.article-page .layout {
  width: 80%;
  margin: 18px auto 34px;
  display: block;
}

.article-page .layout > aside.box { display: none; }

.article-page .layout > article.box {
  background: var(--article-surface);
  border: 1px solid var(--article-border);
  border-radius: 12px;
  padding: 16px 20px 28px;
}

.article-page header {
  border-bottom-color: var(--article-border);
  backdrop-filter: blur(8px);
}

.article-page footer {
  width: 80%;
  color: var(--article-muted);
}

.trt-hero {
  position: relative;
  padding: 28px 0 22px;
  width: 100%;
}

.trt-hero::before {
  content: "";
  position: absolute;
  top: -80px;
  left: 50%;
  transform: translateX(-50%);
  width: min(860px, 96%);
  height: 420px;
  background: radial-gradient(ellipse at 30% 40%, rgba(37,99,235,0.09) 0%, transparent 62%),
              radial-gradient(ellipse at 70% 60%, rgba(124,58,237,0.08) 0%, transparent 58%);
  pointer-events: none;
  z-index: 0;
}

.trt-hero > * { position: relative; z-index: 1; }

.trt-hero-eyebrow {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--article-accent);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.trt-hero-eyebrow::before {
  content: "";
  display: block;
  width: 32px;
  height: 1px;
  background: var(--article-accent);
}

h1.trt-hero-title {
  font-family: Inter, Segoe UI, Roboto, Arial, sans-serif;
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: #0f172a;
  max-width: 820px;
  margin-bottom: 24px;
}

h1.trt-hero-title em {
  font-style: normal;
  background: linear-gradient(90deg, var(--article-accent), var(--article-accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.trt-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  align-items: center;
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  color: var(--article-muted);
  margin-bottom: 22px;
}

.trt-hero-meta span { display: flex; align-items: center; gap: 6px; }

.trt-hero-tags { display: flex; flex-wrap: wrap; gap: 8px; }

.trt-tag {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  padding: 4px 10px;
  border: 1px solid var(--article-border);
  border-radius: 4px;
  color: var(--article-muted);
  background: var(--article-surface-2);
  letter-spacing: 0.05em;
  transition: border-color 0.2s, color 0.2s;
}

.trt-tag:hover { border-color: var(--article-accent); color: var(--article-accent); }

.trt-hero-divider {
  height: 1px;
  width: 100%;
  margin: 0;
  background: linear-gradient(90deg, var(--article-accent) 0%, var(--article-accent-2) 38%, transparent 82%);
}

.trt-page-wrap {
  display: grid;
  grid-template-columns: var(--article-sidebar) 1fr;
  grid-template-areas: "toc main";
  width: 100%;
  gap: 0 24px;
  padding: 0;
}

.trt-toc-wrap {
  grid-area: toc;
  display: block;
  margin: 0;
  padding-top: 28px;
}

.trt-toc {
  display: block;
  position: sticky;
  top: 20px;
  background: var(--article-surface-2);
  border: 1px solid var(--article-border);
  border-radius: 10px;
  padding: 16px;
  font-family: "JetBrains Mono", monospace;
  font-size: 11.5px;
  overflow: hidden;
}

.trt-toc-title {
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--article-muted);
  margin-bottom: 12px;
  font-weight: 600;
}

.trt-toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: block;
}

.trt-toc li {
  counter-increment: toc;
  margin: 0 0 2px;
}

.trt-toc ol { counter-reset: toc; }

.trt-toc a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  color: #374151;
  text-decoration: none;
  border-radius: 4px;
  padding: 5px 8px;
  border: 0;
  line-height: 1.4;
  transition: color 0.15s, background 0.15s;
}

.trt-toc a:hover {
  background: #eef2ff;
  color: #1d4ed8;
}

.trt-toc a.active {
  background: #dbeafe;
  color: #1d4ed8;
}

.trt-toc a::before {
  content: counter(toc, decimal-leading-zero);
  color: var(--article-accent);
  opacity: 0.75;
  font-size: 9px;
  flex-shrink: 0;
}

.trt-main {
  grid-area: main;
  max-width: 100%;
  min-width: 0;
  padding: 36px 0 46px;
}

.trt-section { margin-bottom: 72px; }

.trt-section h2 {
  font-family: Inter, Segoe UI, Roboto, Arial, sans-serif;
  font-size: 26px;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 20px;
  padding-top: 24px;
  border-top: 1px solid var(--article-border);
  display: flex;
  align-items: center;
  gap: 12px;
}

.trt-section .sec-num {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  color: var(--article-accent);
  opacity: 0.75;
  letter-spacing: 0.05em;
}

.trt-section h3 {
  font-family: Inter, Segoe UI, Roboto, Arial, sans-serif;
  font-size: 18px;
  font-weight: 600;
  color: #1f2937;
  margin: 36px 0 12px;
}

.trt-section h4 {
  font-family: "JetBrains Mono", monospace;
  font-size: 13px;
  color: var(--article-accent-3);
  margin: 28px 0 8px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.trt-section p { margin-bottom: 16px; color: #374151; }
.trt-section li { color: #374151; }
.trt-section strong { color: #0f172a; }
.trt-section em { color: var(--article-accent-3); }

.trt-section a {
  color: var(--article-accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(37,99,235,0.35);
}

.trt-section a:hover { border-bottom-color: var(--article-accent); }

.callout {
  border-left: 3px solid;
  padding: 16px 20px;
  border-radius: 0 8px 8px 0;
  margin: 24px 0;
  font-size: 15px;
  line-height: 1.7;
  background: var(--article-surface-2);
}

.callout-head {
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 6px;
  font-weight: 600;
}

.callout.info { border-color: var(--article-accent); background: rgba(37,99,235,0.08); }
.callout.warn { border-color: #d97706; background: rgba(217,119,6,0.08); }
.callout.danger { border-color: var(--article-red); background: rgba(185,28,28,0.08); }
.callout.success { border-color: var(--article-green); background: rgba(21,128,61,0.08); }
.callout.info .callout-head { color: var(--article-accent); }
.callout.warn .callout-head { color: #b45309; }
.callout.danger .callout-head { color: var(--article-red); }
.callout.success .callout-head { color: var(--article-green); }

.code-block {
  background: var(--article-code-bg);
  border: 1px solid var(--article-code-border);
  border-radius: 8px;
  margin: 20px 0;
  overflow: hidden;
  font-family: "JetBrains Mono", monospace;
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: rgba(255,255,255,0.04);
  border-bottom: 1px solid var(--article-code-border);
}

.code-lang {
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #93c5fd;
  font-weight: 600;
}

.code-label {
  font-size: 10px;
  color: #94a3b8;
  letter-spacing: 0.05em;
}

.copy-btn {
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  padding: 4px 10px;
  background: transparent;
  border: 1px solid #334155;
  color: #cbd5e1;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 0.05em;
}

.copy-btn:hover { border-color: #93c5fd; color: #93c5fd; }
.copy-btn.copied { border-color: var(--article-green); color: var(--article-green); }

pre {
  padding: 20px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.75;
  tab-size: 2;
}

pre code { color: #c8d3f5; }

.kw { color: #89ddff; }
.cm { color: #4a5073; font-style: italic; }
.st { color: #c3e88d; }
.nm { color: #f78c6c; }
.fn { color: #82aaff; }
.fl { color: #ffcb6b; }
.op { color: #89ddff; }
.var { color: #f07178; }
.pn { color: #94a3b8; }

code { font-family: "JetBrains Mono", monospace; font-size: 0.88em; }

p code, li code {
  background: rgba(37,99,235,0.08);
  border: 1px solid rgba(37,99,235,0.15);
  color: var(--article-accent);
  padding: 1px 6px;
  border-radius: 3px;
}

.table-wrap {
  overflow-x: auto;
  margin: 24px 0;
  border-radius: 8px;
  border: 1px solid var(--article-border);
}

table { width: 100%; border-collapse: collapse; font-size: 14px; }
thead tr { background: #f9fafb; }

th {
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #6b7280;
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--article-border);
}

td {
  padding: 11px 16px;
  border-bottom: 1px solid #edf2f7;
  color: #374151;
  vertical-align: top;
}

tr:last-child td { border-bottom: none; }
tr:hover td { background: #f8fafc; }
td.yes { color: var(--article-green); font-family: "JetBrains Mono", monospace; font-size: 12px; }
td.no { color: var(--article-red); font-family: "JetBrains Mono", monospace; font-size: 12px; }
td.meh { color: #b45309; font-family: "JetBrains Mono", monospace; font-size: 12px; }

.arch-diagram {
  background: #f8fafc;
  border: 1px solid var(--article-border);
  border-radius: 8px;
  padding: 28px 24px;
  font-family: "JetBrains Mono", monospace;
  font-size: 12.5px;
  line-height: 1.7;
  color: #64748b;
  overflow-x: auto;
  margin: 20px 0;
}

.arch-diagram .highlight { color: var(--article-accent); }
.arch-diagram .highlight2 { color: var(--article-accent-2); }
.arch-diagram .highlight3 { color: #d97706; }
.arch-diagram .green { color: var(--article-green); }

.gpu-bar-wrap {
  background: #f8fafc;
  border: 1px solid var(--article-border);
  border-radius: 8px;
  padding: 24px;
  margin: 24px 0;
}

.gpu-bar-label {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  color: var(--article-muted);
  margin-bottom: 14px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.gpu-bar {
  display: flex;
  height: 36px;
  border-radius: 6px;
  overflow: hidden;
  gap: 2px;
}

.gpu-seg {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  font-weight: 600;
}

.gpu-seg.s1 { background: linear-gradient(90deg, #0891b2, #0284c7); width: 80%; }
.gpu-seg.s2 { background: linear-gradient(90deg, #7c3aed, #6d28d9); width: 10%; }
.gpu-seg.s3 { background: linear-gradient(90deg, #d97706, #b45309); width: 5%; }
.gpu-seg.s4 { background: #e5e7eb; width: 5%; color: #6b7280; }

.gpu-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 14px;
}

.gpu-legend-item {
  display: flex;
  align-items: center;
  gap: 7px;
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  color: var(--article-muted);
}

.legend-dot { width: 10px; height: 10px; border-radius: 2px; flex-shrink: 0; }
.d1 { background: #0891b2; }
.d2 { background: #7c3aed; }
.d3 { background: #d97706; }
.d4 { background: #e5e7eb; border: 1px solid #d1d5db; }

.step-list { list-style: none; padding: 0; }
.step-list > li {
  display: flex;
  gap: 20px;
  margin-bottom: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--article-border);
}
.step-list > li:last-child { border-bottom: none; margin-bottom: 0; }

.step-num {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #f8fafc;
  border: 1px solid var(--article-accent);
  color: var(--article-accent);
  font-family: "JetBrains Mono", monospace;
  font-size: 13px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 3px;
}

.step-body { flex: 1; min-width: 0; }
.step-title {
  font-family: Inter, Segoe UI, Roboto, Arial, sans-serif;
  font-size: 17px;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 10px;
}

.env-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.env-table th {
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #6b7280;
  padding: 10px 14px;
  border-bottom: 1px solid var(--article-border);
  text-align: left;
}
.env-table td {
  padding: 10px 14px;
  border-bottom: 1px solid #edf2f7;
  vertical-align: top;
}
.env-table tr:last-child td { border-bottom: none; }
.env-table code {
  background: rgba(37,99,235,0.07);
  border: 1px solid rgba(37,99,235,0.12);
  color: var(--article-accent);
  padding: 1px 6px;
  border-radius: 3px;
  font-size: 12px;
}
.env-table .default { color: #b45309; font-family: "JetBrains Mono", monospace; font-size: 12px; }
.env-table .desc { color: #6b7280; font-size: 13px; }

.trt-article-footer {
  border-top: 1px solid var(--article-border);
  padding: 40px 24px 0;
  text-align: center;
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  color: var(--article-muted);
  letter-spacing: 0.05em;
}

@media (max-width: 600px) {
  .article-page .layout > article.box { padding: 14px 12px 20px; }
  .trt-hero { padding: 20px 0 18px; }
  h1.trt-hero-title { font-size: 28px; }
  pre { font-size: 11.5px; }
}

@media (max-width: 900px) {
  .trt-page-wrap {
    grid-template-columns: 1fr;
    grid-template-areas: "main";
  }
  .trt-toc-wrap { display: none; }
  .trt-main { max-width: 100%; padding: 32px 0 80px; }
}