/* CAPTAINAI — modern monochrome minimal */

/* light is the default; explicit choice via html[data-theme]; auto follows the OS */
:root {
  color-scheme: light;
  --bg: #f9f9f8;
  --fg: #1c1c1c;
  --muted: #757570;
  --line: #e7e7e4;
  --line-strong: #d2d2cf;
  --surface: #f0f0ee;
  --code-bg: #161618;
  --code-fg: #e8e8e8;
  --maxw: 760px;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #161617;
  --fg: #e4e4e2;
  --muted: #9c9c98;
  --line: #27272a;
  --line-strong: #3c3c40;
  --surface: #1d1d1f;
  --code-bg: #101012;
  --code-fg: #e2e2e0;
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme]) {
    color-scheme: dark;
    --bg: #161617;
    --fg: #e4e4e2;
    --muted: #9c9c98;
    --line: #27272a;
    --line-strong: #3c3c40;
    --surface: #1d1d1f;
    --code-bg: #101012;
    --code-fg: #e2e2e0;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.75 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter,
    "Helvetica Neue", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

::selection { background: var(--fg); color: var(--bg); }

a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

.mono, code, pre, kbd, input, select, textarea {
  font-family: ui-monospace, "SF Mono", "JetBrains Mono", "Fira Code", Menlo,
    Consolas, "Liberation Mono", monospace;
}
.muted { color: var(--muted); }
.hidden { display: none !important; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }
main.wrap { flex: 1; padding-top: 52px; padding-bottom: 80px; }

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

.site-header {
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand {
  font-weight: 800;
  letter-spacing: 0.12em;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand:hover { text-decoration: none; }
.brand-mark { width: 10px; height: 10px; background: var(--fg); display: inline-block; }
.brand-dim { color: var(--muted); font-weight: 500; letter-spacing: 0.08em; }
.lang-switch {
  font-size: 12px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 4px 12px;
  letter-spacing: 0.06em;
}
.lang-switch:hover { border-color: var(--fg); text-decoration: none; }

.header-nav { display: flex; align-items: center; gap: 8px; }
.theme-toggle {
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: none;
  color: var(--fg);
  cursor: pointer;
  padding: 0;
  transition: border-color 0.15s ease;
}
.theme-toggle:hover { border-color: var(--fg); }
.theme-toggle svg { width: 15px; height: 15px; display: block; }
.theme-toggle svg[hidden] { display: none; }

.site-footer { border-top: 1px solid var(--line); }
.footer-inner { display: flex; justify-content: space-between; align-items: center; padding: 22px; font-size: 13px; }
.footer-right { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.footer-right a:hover { color: var(--fg); }

/* ---------- page head ---------- */

.page-head { margin-bottom: 34px; }
.site-title { font-size: 30px; letter-spacing: 0.04em; margin: 0 0 6px; }
.tagline { margin: 0 0 16px; font-size: 15px; }
.filters { display: flex; gap: 8px; flex-wrap: wrap; font-size: 12px; }

/* ---------- chips / badges ---------- */

.chip {
  display: inline-block;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 1px 10px;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}
a.chip:hover { border-color: var(--fg); text-decoration: none; }
.chip-active { background: var(--fg); color: var(--bg); border-color: var(--fg); }
.sev-critical { background: var(--fg); color: var(--bg); border-color: var(--fg); }
.sev-high { border-color: var(--fg); font-weight: 700; }
.cve { font-size: 12px; color: var(--muted); }
.tag {
  border: 1px solid var(--line);
  padding: 0 8px;
  border-radius: 999px;
  font-size: 11px;
}
.tag:hover { border-color: var(--fg); text-decoration: none; }

/* ---------- post list ---------- */

.post-list { list-style: none; margin: 0; padding: 0; }
.post-row { border-bottom: 1px solid var(--line); }
.post-link { display: flex; gap: 18px; padding: 18px 4px; align-items: baseline; }
.post-link:hover { text-decoration: none; background: var(--surface); }
.post-link:hover .row-title { text-decoration: underline; text-underline-offset: 3px; }
.date { font-size: 12.5px; color: var(--muted); flex: 0 0 92px; }
.row-main { display: flex; flex-direction: column; gap: 5px; min-width: 0; }
.row-title { font-weight: 650; font-size: 16.5px; }
.row-sub { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.row-excerpt { font-size: 13.5px; line-height: 1.6; }
.empty { padding: 70px 0; text-align: center; }

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

.post-title { font-size: 32px; line-height: 1.25; margin: 0 0 10px; letter-spacing: -0.01em; }
.post-meta {
  font-size: 12.5px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  margin: 0 0 6px;
}
.note { font-size: 13px; border-left: 2px solid var(--line-strong); padding-left: 12px; }

.post-body { margin-top: 28px; font-size: 16.5px; overflow-wrap: break-word; }
.post-body h1, .post-body h2, .post-body h3, .post-body h4 { letter-spacing: -0.01em; line-height: 1.3; }
.post-body h2 { font-size: 24px; margin: 40px 0 12px; }
.post-body h3 { font-size: 19px; margin: 32px 0 10px; }
.post-body p { margin: 16px 0; }
.post-body ul, .post-body ol { padding-left: 26px; margin: 16px 0; }
.post-body li { margin: 6px 0; }
.post-body blockquote {
  margin: 18px 0;
  border-left: 3px solid var(--fg);
  padding: 4px 18px;
  color: var(--muted);
  background: var(--surface);
}
.post-body img { max-width: 100%; }
.post-body hr { border: 0; border-top: 1px solid var(--line); margin: 36px 0; }
.post-body table { border-collapse: collapse; width: 100%; font-size: 14px; margin: 20px 0; display: block; overflow-x: auto; }
.post-body th, .post-body td { border: 1px solid var(--line); padding: 8px 12px; text-align: left; }
.post-body th { background: var(--surface); font-size: 12px; letter-spacing: 0.04em; text-transform: uppercase; }
.post-body a { text-decoration: underline; text-underline-offset: 3px; }
.post-body code {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.86em;
}
.post-body pre {
  background: var(--code-bg);
  color: var(--code-fg);
  padding: 18px;
  border-radius: 10px;
  overflow-x: auto;
  line-height: 1.6;
  font-size: 13.5px;
  margin: 20px 0;
}
.post-body pre code { background: none; border: 0; padding: 0; color: inherit; font-size: inherit; }
.post-body .codehilite { background: var(--code-bg); border-radius: 10px; margin: 20px 0; }
.post-body .codehilite pre { margin: 0; }
.post-body .codehilite .hll { background: #3a3a3a; }

/* ---------- cti meta ---------- */

.cti-meta { border: 1px solid var(--line); border-radius: 10px; margin: 22px 0; padding: 4px 18px; font-size: 14px; }
.cti-meta > div { display: flex; gap: 14px; padding: 9px 0; border-bottom: 1px solid var(--line); }
.cti-meta > div:last-child { border-bottom: 0; }
.cti-meta .k {
  flex: 0 0 110px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  padding-top: 3px;
}
.cti-meta .v { word-break: break-all; min-width: 0; }
.refs { display: flex; flex-direction: column; gap: 2px; }
.refs a { text-decoration: underline; text-underline-offset: 3px; font-size: 13px; }

/* ---------- lock card / messages ---------- */

.lock-card {
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  padding: 36px 28px;
  margin: 26px 0;
  max-width: 470px;
}
.lock-card.center { margin: 44px auto; text-align: center; max-width: 420px; }
.lock-card .stack.left { text-align: left; }
.lock-icon { font-size: 19px; letter-spacing: 0.3em; margin: 0 0 10px; }
.lock-card form { display: flex; gap: 10px; margin-top: 18px; }
.lock-card input[type="password"] { flex: 1; }
.card-title { font-size: 20px; margin: 0 0 12px; }
.big404 { font-size: 34px; margin: 0 0 6px; font-weight: 800; letter-spacing: 0.1em; }
.error { font-weight: 650; margin: 12px 0 0; }
.banner { border: 1px solid var(--fg); padding: 10px 14px; border-radius: 8px; font-weight: 600; }

/* ---------- forms / buttons ---------- */

input, select, textarea {
  font-size: 14px;
  color: inherit;
  background: var(--bg);
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  padding: 9px 12px;
  width: 100%;
}
input:focus, select:focus, textarea:focus {
  outline: 2px solid var(--fg);
  outline-offset: 0;
  border-color: var(--fg);
}
textarea { resize: vertical; line-height: 1.65; }
.mono-input { font-size: 13.5px; }

.btn {
  display: inline-block;
  background: var(--fg);
  color: var(--bg);
  border: 1px solid var(--fg);
  border-radius: 8px;
  padding: 9px 18px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
}
.btn:hover { opacity: 0.85; text-decoration: none; }
.btn-ghost {
  display: inline-block;
  background: none;
  color: var(--fg);
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  padding: 8px 16px;
  font-size: 14px;
  cursor: pointer;
}
.btn-ghost:hover { border-color: var(--fg); text-decoration: none; }
.btn-danger {
  background: none;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  padding: 3px 10px;
  font-size: 12px;
  cursor: pointer;
}
.btn-danger:hover { border-color: var(--fg); background: var(--fg); color: var(--bg); }

/* ---------- admin ---------- */

.admin-head { display: flex; justify-content: space-between; align-items: center; margin: 6px 0 24px; }
.admin-head h1 { font-size: 24px; margin: 0; }
.row-gap { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.inline { display: inline; }
.stack { display: flex; flex-direction: column; gap: 16px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.label {
  display: block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-bottom: 6px;
}
.fieldset {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px 18px 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin: 0;
}
.fieldset legend { padding: 0 8px; }
.check { display: flex; gap: 10px; align-items: center; font-size: 14px; }
.check input { width: auto; }
.admin-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.admin-table th {
  text-align: left;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  border-bottom: 1px solid var(--line-strong);
  padding: 8px 10px;
}
.admin-table td { border-bottom: 1px solid var(--line); padding: 10px; vertical-align: top; }
.view-link { font-size: 12px; margin-left: 6px; }

/* ---------- home (captainai.xin landing) ---------- */

@font-face {
  font-family: "Archivo Black";
  src: url("/static/fonts/archivo-black.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

.hero { padding: 7vh 0 6vh; }

.wordmark {
  font-family: "Archivo Black", "Arial Black", -apple-system, sans-serif;
  font-size: clamp(52px, 12.4vw, 172px);
  line-height: 0.95;
  letter-spacing: -0.015em;
  margin: 0 0 20px;
  display: flex;
  flex-wrap: wrap;
  user-select: none;
}
.wordmark .wm-l {
  display: inline-block;
  animation: rise 0.55s cubic-bezier(0.2, 0.8, 0.2, 1) both;
  transition: color 0.2s ease;
}
@supports (-webkit-text-stroke: 2px #000) {
  .wordmark .wm-outline {
    color: transparent;
    -webkit-text-stroke: max(2px, 0.026em) var(--fg);
    transition: color 0.18s ease;
  }
  .wordmark .wm-outline:hover { color: var(--fg); }
}

.hero-sub { font-size: 15px; max-width: 560px; margin: 0; animation: rise 0.5s 0.4s ease both; }

.hero-term {
  font-size: 13px;
  margin: 14px 0 0;
  animation: rise 0.5s 0.5s ease both;
}
.hero-term .cursor {
  display: inline-block;
  margin-left: 3px;
  animation: blink 1.1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.marquee {
  background: var(--fg);
  color: var(--bg);
  overflow: hidden;
  white-space: nowrap;
  margin: 26px calc(50% - 50vw) 40px;
  padding: 0;
}
.marquee-track {
  display: flex;
  width: max-content;
  padding: 10px 0;
  font-size: 12.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  animation: marquee 28s linear infinite;
}
@keyframes marquee { to { transform: translateX(-50%); } }

@media (prefers-reduced-motion: reduce) {
  .wordmark .wm-l,
  .hero-sub,
  .hero-term { animation: none; }
  .marquee-track { animation: none; }
  .hero-term .cursor { animation: none; }
}

.entries { border-top: 1px solid var(--line-strong); }
.entry-row {
  display: grid;
  grid-template-columns: 56px 170px 1fr 44px;
  align-items: baseline;
  gap: 20px;
  padding: 28px 10px;
  border-bottom: 1px solid var(--line);
  transition: background 0.15s ease, color 0.15s ease;
}
.entry-row:hover {
  background: var(--fg);
  color: var(--bg);
  text-decoration: none;
}
.entry-no { font-size: 13px; color: var(--muted); transition: color 0.15s; }
.entry-name {
  font-size: clamp(26px, 4.5vw, 40px);
  font-weight: 800;
  letter-spacing: 0.02em;
  line-height: 1.1;
}
.entry-desc { font-size: 14px; transition: color 0.15s; }
.entry-arrow { font-size: 24px; justify-self: end; transition: transform 0.15s ease; }
.entry-row:hover .entry-no,
.entry-row:hover .entry-desc { color: inherit; opacity: 0.72; }
.entry-row:hover .entry-arrow { transform: translateX(8px); }

.latest { margin-top: 64px; }
.section-label {
  font-size: 11px;
  letter-spacing: 0.15em;
  color: var(--muted);
  text-transform: uppercase;
  font-weight: 700;
  margin: 0 0 6px;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}

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

@media (max-width: 640px) {
  .post-link { flex-direction: column; gap: 4px; }
  .date { flex: none; }
  .grid2 { grid-template-columns: 1fr; }
  .post-title { font-size: 26px; }
  .cti-meta .k { flex-basis: 92px; }
  .lock-card form { flex-direction: column; }
  .lock-card { padding: 28px 20px; }
  .footer-inner { flex-direction: column; gap: 4px; }
  .entry-row { grid-template-columns: 40px 1fr 34px; grid-template-rows: auto auto; padding: 22px 4px; }
  .entry-name { grid-column: 2; grid-row: 1; }
  .entry-desc { grid-column: 2; grid-row: 2; }
  .entry-arrow { grid-column: 3; grid-row: 1; }
  .entry-no { grid-column: 1; grid-row: 1; }
  .hero { padding: 6vh 0 5vh; }
}