/* ============================================================
   opencode · deepseek flash 07/31 — Boris theme
   Editorial, dark-capable, zero frameworks, zero build services.
   ============================================================ */

:root {
  --ink: #1f2328;
  --paper: #ffffff;
  --muted: #59636e;
  --rule: #d1d9e0;
  --rule-soft: #e7ebf0;
  --accent: #0b6bcb;
  --accent-2: #7c3aed;
  --accent-3: #0e9f6e;
  --grad: linear-gradient(100deg, var(--accent) 0%, var(--accent-2) 55%, var(--accent-3) 100%);
  --code-bg: #f4f6f8;
  --chip-bg: #eef3f8;
  --corner-bg: #ffffff;
  --corner-border: #d0d7de;
  --shadow-sm: 0 1px 2px rgba(31, 35, 40, 0.08);
  --shadow-md: 0 6px 24px rgba(31, 35, 40, 0.14);
  --radius: 10px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e6edf3;
    --paper: #0d1117;
    --muted: #9198a1;
    --rule: #30363d;
    --rule-soft: #21262d;
    --accent: #58a6ff;
    --accent-2: #a78bfa;
    --accent-3: #3fb68b;
    --code-bg: #161b22;
    --chip-bg: #161b22;
    --corner-bg: #161b22;
    --corner-border: #30363d;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.55);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  padding: 0 1.5rem 4rem;
  font-family: var(--font);
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

/* ---------- header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule-soft);
  margin: 0 calc(-1.5rem);
  padding: 0 1.5rem;
}

.header-inner {
  max-width: 76rem;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0.6rem 0;
  flex-wrap: wrap;
}

.site-title {
  text-decoration: none;
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  margin-right: auto;
}

.site-title-mark {
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.site-title-sub {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
}

.site-nav a {
  color: var(--ink);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  transition: background 0.15s ease, color 0.15s ease;
}

.site-nav a:hover {
  background: var(--chip-bg);
  color: var(--accent);
}

/* ---------- search ---------- */

.search-wrap { position: relative; }

.search-input {
  width: 17rem;
  max-width: 60vw;
  font: inherit;
  font-size: 0.9rem;
  padding: 0.42rem 0.9rem 0.42rem 2rem;
  border-radius: 999px;
  border: 1px solid var(--rule);
  background: var(--paper);
  color: var(--ink);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.search-input::placeholder { color: var(--muted); }

.search-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent);
}

.search-wrap::before {
  content: "⌕";
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-52%);
  color: var(--muted);
  font-size: 1rem;
  pointer-events: none;
}

.search-results {
  position: absolute;
  right: 0;
  top: calc(100% + 0.5rem);
  width: 26rem;
  max-width: 80vw;
  max-height: 70vh;
  overflow-y: auto;
  background: var(--corner-bg);
  border: 1px solid var(--corner-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 0.35rem;
  z-index: 40;
}

.search-status {
  padding: 0.6rem 0.8rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.search-result {
  display: block;
  padding: 0.55rem 0.8rem;
  border-radius: 8px;
  text-decoration: none;
  color: var(--ink);
}

.search-result:hover, .search-result[aria-selected="true"] {
  background: var(--chip-bg);
}

.search-result-title {
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 0.15rem;
}

.search-result-title mark {
  background: transparent;
  color: var(--accent);
  font-weight: 800;
}

.search-result-snippet {
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.search-result-snippet mark {
  background: color-mix(in srgb, var(--accent) 22%, transparent);
  color: var(--ink);
  border-radius: 3px;
  padding: 0 0.1em;
}

.search-result-path {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--muted);
  margin-top: 0.1rem;
}

/* ---------- main ---------- */

.site-body {
  max-width: 76rem;
  margin: 0 auto;
  padding-top: 1.6rem;
}

.site-breadcrumb {
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 1.2rem;
}

.site-breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px dotted var(--rule);
}

.site-breadcrumb a:hover { color: var(--accent); border-color: var(--accent); }

.layout-grid {
  display: grid;
  grid-template-columns: minmax(11rem, 15rem) minmax(0, 1fr) minmax(11rem, 15rem);
  gap: 2rem;
  align-items: start;
}

.site-toc {
  position: sticky;
  top: 5.5rem;
  font-size: 0.85rem;
}

.site-toc > p:first-child { display: none; }

.site-toc ul {
  list-style: none;
  margin: 0;
  padding: 0 0 0 0.9rem;
  border-left: 1px solid var(--rule-soft);
}

.site-toc li { margin: 0.15rem 0; }

.site-toc a {
  color: var(--muted);
  text-decoration: none;
  display: block;
  padding: 0.12rem 0.5rem;
  border-radius: 6px;
}

.site-toc a:hover { color: var(--accent); background: var(--chip-bg); }

/* ---------- article ---------- */

.site-content {
  min-width: 0;
  max-width: 52rem;
}

.site-content > h1 {
  font-size: 2.1rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 0.2rem 0 1rem;
  line-height: 1.15;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.site-content h2 {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 2rem 0 0.6rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--rule-soft);
}

.site-content h3 { font-size: 1.1rem; margin: 1.5rem 0 0.4rem; }

.site-content p { margin: 0.7rem 0; }

.site-content a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--accent) 40%, transparent);
  transition: border-color 0.15s ease;
}

.site-content a:hover { border-color: var(--accent); }

.site-content ul, .site-content ol { padding-left: 1.3rem; }
.site-content li { margin: 0.25rem 0; }

.site-content blockquote {
  margin: 1rem 0;
  padding: 0.6rem 1.1rem;
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
  background: var(--chip-bg);
  color: var(--muted);
}

.site-content blockquote p { margin: 0.3rem 0; }

.site-content code {
  font-family: var(--mono);
  font-size: 0.85em;
  background: var(--code-bg);
  border-radius: 5px;
  padding: 0.12em 0.38em;
  border: 1px solid var(--rule-soft);
}

.site-content pre {
  font-family: var(--mono);
  font-size: 0.85rem;
  background: var(--code-bg);
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius);
  padding: 0.9rem 1.1rem;
  overflow-x: auto;
  line-height: 1.55;
}

.site-content pre code {
  background: transparent;
  border: 0;
  padding: 0;
}

.site-content table {
  border-collapse: collapse;
  width: 100%;
  margin: 1.2rem 0;
  font-size: 0.92rem;
}

.site-content th, .site-content td {
  border: 1px solid var(--rule-soft);
  padding: 0.5rem 0.85rem;
  text-align: left;
  vertical-align: top;
}

.site-content th {
  background: var(--chip-bg);
  font-weight: 700;
}

.site-content tr:nth-child(even) td { background: color-mix(in srgb, var(--paper) 98%, var(--muted)); }

.site-content hr {
  border: 0;
  border-top: 1px solid var(--rule-soft);
  margin: 2rem 0;
}

/* ---------- graph rail ---------- */

.site-graph {
  position: sticky;
  top: 5.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  font-size: 0.85rem;
  min-width: 0;
}

.site-graph section,
.site-graph .page-children,
.site-graph .page-metadata {
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius);
  padding: 0.7rem 0.9rem;
  background: color-mix(in srgb, var(--paper) 96%, var(--muted));
}

.site-graph section > h2,
.site-graph .page-children > h2,
.site-graph .page-metadata > h2 {
  font-size: 0.7rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin: 0 0 0.4rem;
  color: var(--muted);
}

.site-graph ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-graph li { margin: 0.2rem 0; }

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

.page-metadata dl { margin: 0; }
.page-metadata dl > div { display: flex; gap: 0.5rem; padding: 0.2rem 0; border-top: 1px dashed var(--rule-soft); }
.page-metadata dl > div:first-child { border-top: 0; }
.page-metadata dt { font-weight: 700; color: var(--muted); }
.page-metadata dd { margin: 0; }

/* ---------- footer ---------- */

.site-footer {
  max-width: 76rem;
  margin: 3.5rem auto 0;
  padding-top: 1.2rem;
  border-top: 1px solid var(--rule-soft);
  color: var(--muted);
  font-size: 0.85rem;
}

.site-footer p { margin: 0.35rem 0; }
.site-footer .footer-meta { font-size: 0.78rem; opacity: 0.85; }
.site-footer a { color: var(--accent); text-decoration: none; }
.site-footer code { font-family: var(--mono); font-size: 0.82em; background: var(--code-bg); border-radius: 4px; padding: 0.08em 0.3em; }

/* ---------- corner card ---------- */

.boris-corner {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  max-width: 21rem;
  font-size: 0.8rem;
  line-height: 1.45;
  background: var(--corner-bg);
  border: 1px solid var(--corner-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  z-index: 30;
  overflow: hidden;
}

.boris-corner summary {
  cursor: pointer;
  padding: 0.55rem 0.85rem;
  user-select: none;
  background: linear-gradient(100deg,
    color-mix(in srgb, var(--accent) 12%, transparent),
    color-mix(in srgb, var(--accent-2) 10%, transparent));
  list-style: none;
}

.boris-corner summary::-webkit-details-marker { display: none; }

.boris-corner summary::before { content: "▸ "; color: var(--accent); }
.boris-corner[open] summary::before { content: "▾ "; }

.boris-corner .boris-ver {
  float: right;
  color: var(--accent);
  font-weight: 700;
  font-family: var(--mono);
}

.boris-corner .boris-corner-body {
  padding: 0.1rem 0.85rem 0.85rem;
  color: var(--ink);
  animation: corner-in 0.18s ease;
}

@keyframes corner-in {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.boris-corner .boris-corner-body p { margin: 0.45rem 0; }
.boris-corner code {
  font-family: var(--mono);
  font-size: 0.72rem;
  background: var(--code-bg);
  border: 1px solid var(--rule-soft);
  border-radius: 4px;
  padding: 0.05em 0.3em;
}
.boris-corner a { color: var(--accent); text-decoration: none; border-bottom: 1px dotted currentColor; }

/* ---------- responsive ---------- */

@media (max-width: 64rem) {
  .layout-grid { grid-template-columns: minmax(0, 1fr); }
  .site-toc { position: static; }
  .site-graph { position: static; }
}

@media (max-width: 42rem) {
  .header-inner { gap: 0.75rem; }
  .site-nav { order: 3; width: 100%; }
  .search-input { width: 100%; }
  .search-wrap { flex: 1; }
}

/* ---------- a11y ---------- */

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}