/* ============ PulseDSP — Knowledge Base site ============ */
:root {
  --bg: #05060f;
  --panel: #0c0d1c;
  --panel-2: #12132a;
  --line: rgba(167, 139, 250, 0.14);
  --line-2: rgba(148, 163, 184, 0.10);
  --ink: #e6e8f2;
  --ink-soft: #aab0cc;
  --ink-faint: #6b7099;
  --violet: #a78bfa;
  --pink: #ec4899;
  --grad: linear-gradient(90deg, #a78bfa, #ec4899);
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --sans: "Inter", system-ui, sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { min-height: 100%; }
body {
  font-family: var(--sans);
  color: var(--ink);
  background:
    radial-gradient(ellipse 70% 50% at 80% -10%, rgba(139, 92, 246, 0.10), transparent),
    radial-gradient(ellipse 50% 40% at 0% 100%, rgba(236, 72, 153, 0.06), transparent),
    var(--bg);
  -webkit-font-smoothing: antialiased;
}

/* ---------- header ---------- */
.kbhead {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 20px;
  padding: 14px 26px;
  background: rgba(5, 6, 15, 0.82);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.kbhead__brand { display: flex; align-items: center; gap: 11px; }
.kbhead__brand svg { width: 30px; height: 30px; flex: none; }
.kbhead__word { font-weight: 600; font-size: 18px; letter-spacing: .2px; }
.kbhead__word b { font-weight: 700; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.kbhead__tag {
  font-family: var(--mono); font-size: 9.5px; letter-spacing: 1.6px; text-transform: uppercase;
  color: var(--ink-faint); border: 1px solid var(--line); border-radius: 999px; padding: 4px 9px; margin-left: 4px;
}
.kbhead__tools { margin-left: auto; display: flex; align-items: center; gap: 12px; }
.kbsearch {
  width: min(340px, 42vw);
  background: rgba(3, 4, 12, 0.6); border: 1px solid rgba(71, 71, 105, 0.5);
  border-radius: 9px; color: var(--ink); font-family: var(--sans); font-size: 13.5px;
  padding: 9px 13px; outline: none; transition: border-color .15s ease;
}
.kbsearch:focus { border-color: var(--violet); }
.kbsearch::placeholder { color: var(--ink-faint); }
.kbhead__out {
  font-family: var(--mono); font-size: 11px; color: var(--ink-soft);
  background: transparent; border: 1px solid var(--line); border-radius: 8px;
  padding: 8px 12px; cursor: pointer; transition: all .15s ease;
}
.kbhead__out:hover { color: var(--ink); border-color: var(--violet); }

/* ---------- layout ---------- */
.kbwrap { display: grid; grid-template-columns: 232px 1fr; max-width: 1180px; margin: 0 auto; }
.kbnav {
  position: sticky; top: 61px; align-self: start;
  height: calc(100vh - 61px); overflow-y: auto;
  padding: 24px 14px; border-right: 1px solid var(--line-2);
}
.kbnav__label { font-family: var(--mono); font-size: 9.5px; letter-spacing: 1.4px; text-transform: uppercase; color: var(--ink-faint); margin: 0 0 12px 10px; }
.kbnav__item {
  width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 8px;
  background: transparent; border: 0; border-radius: 8px; cursor: pointer;
  color: var(--ink-soft); font-family: var(--sans); font-size: 13.5px; text-align: left;
  padding: 9px 11px; margin-bottom: 2px; transition: background .12s ease, color .12s ease;
}
.kbnav__item:hover { background: var(--panel); color: var(--ink); }
.kbnav__item.active { background: var(--panel-2); color: var(--ink); box-shadow: inset 2px 0 0 var(--violet); }
.kbnav__n { font-family: var(--mono); font-size: 11px; color: var(--ink-faint); }
.kbnav__item.active .kbnav__n { color: var(--violet); }

.kbmain { padding: 30px 34px 80px; min-height: calc(100vh - 61px); }
.kbmain__head { display: flex; align-items: baseline; gap: 12px; margin-bottom: 22px; }
.kbmain__head h1 { font-size: 22px; font-weight: 700; letter-spacing: -.2px; }
.kbmain__count { font-family: var(--mono); font-size: 11px; color: var(--ink-faint); }
.kbempty { color: var(--ink-faint); font-size: 14px; padding: 40px 4px; }

/* ---------- article cards ---------- */
.kbgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(268px, 1fr)); gap: 15px; }
.kbcard {
  background: linear-gradient(180deg, var(--panel), rgba(12, 13, 28, 0.55));
  border: 1px solid var(--line); border-radius: 13px; padding: 17px 17px 15px;
  cursor: pointer; transition: transform .13s ease, border-color .13s ease, box-shadow .13s ease;
}
.kbcard:hover { transform: translateY(-3px); border-color: rgba(167, 139, 250, 0.4); box-shadow: 0 14px 40px rgba(0, 0, 0, 0.4); }
.kbcard__dept { display: inline-block; font-family: var(--mono); font-size: 9px; letter-spacing: 1.2px; text-transform: uppercase; color: var(--violet); background: rgba(167, 139, 250, 0.1); border: 1px solid var(--line); border-radius: 999px; padding: 3px 9px; }
.kbcard__title { font-size: 15.5px; font-weight: 600; line-height: 1.35; margin: 12px 0 14px; letter-spacing: -.1px; }
.kbcard__meta { display: flex; align-items: center; gap: 9px; font-size: 11.5px; color: var(--ink-soft); }
.kbcard__av { flex: none; width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; font-family: var(--mono); font-size: 10.5px; font-weight: 600; color: #fff; background: var(--grad); }
.kbcard__date { margin-left: auto; text-align: right; font-family: var(--mono); font-size: 10px; color: var(--ink-faint); }

/* ---------- reader ---------- */
.reader { position: fixed; inset: 61px 0 0 0; z-index: 30; background: var(--bg); display: flex; flex-direction: column; }
.reader[hidden] { display: none; }
.reader__bar { display: flex; align-items: center; gap: 10px; padding: 12px 26px; border-bottom: 1px solid var(--line); background: rgba(5, 6, 15, 0.9); backdrop-filter: blur(10px); }
.reader__sp { flex: 1; }
.reader__back { font-family: var(--mono); font-size: 12px; color: var(--ink-soft); background: transparent; border: 1px solid var(--line); border-radius: 8px; padding: 8px 13px; cursor: pointer; transition: all .15s ease; }
.reader__back:hover { color: var(--ink); border-color: var(--violet); }
.reader__doc { flex: 1; overflow-y: auto; padding: 34px 20px 90px; }
.reader__head { max-width: 760px; margin: 0 auto 26px; }
.reader__head h1 { font-size: 27px; font-weight: 700; line-height: 1.2; letter-spacing: -.4px; margin: 13px 0 10px; }
.reader__by { font-family: var(--mono); font-size: 12px; color: var(--ink-faint); }
.reader__content { max-width: 760px; margin: 0 auto; }

/* ---------- rendered document ---------- */
.doc { color: var(--ink); font-size: 15px; line-height: 1.72; }
.doc h1 { font-size: 24px; margin: 26px 0 12px; font-weight: 700; }
.doc h2 { font-size: 19px; margin: 30px 0 12px; font-weight: 650; padding-bottom: 6px; border-bottom: 1px solid var(--line); }
.doc h3 { font-size: 16px; margin: 22px 0 9px; color: var(--violet); font-weight: 600; }
.doc h4 { font-size: 14.5px; margin: 18px 0 7px; color: var(--ink-soft); }
.doc p { margin: 12px 0; color: #d6d9ee; }
.doc ul, .doc ol { margin: 12px 0 12px 24px; }
.doc li { margin: 6px 0; color: #d6d9ee; }
.doc a { color: var(--violet); }
.doc code { background: rgba(148, 163, 184, 0.14); padding: 2px 6px; border-radius: 4px; font-family: var(--mono); font-size: 13px; }
.doc pre { background: #0a0b18; border: 1px solid var(--line); border-radius: 9px; padding: 15px; overflow: auto; margin: 14px 0; }
.doc pre code { background: none; padding: 0; }
.doc blockquote { border-left: 3px solid var(--violet); margin: 14px 0; padding: 4px 16px; color: var(--ink-soft); }
.doc hr { border: none; border-top: 1px solid var(--line); margin: 22px 0; }
.doc table { border-collapse: collapse; width: 100%; margin: 16px 0; font-size: 13.5px; }
.doc th, .doc td { border: 1px solid var(--line); padding: 9px 12px; text-align: left; }
.doc th { background: rgba(167, 139, 250, 0.09); font-weight: 600; }
.doc svg { max-width: 100%; height: auto; background: #fff; border-radius: 10px; padding: 10px; }
.doc iframe { width: 100%; min-height: 78vh; border: 1px solid var(--line); border-radius: 10px; background: #fff; }

/* ---------- buttons / toast ---------- */
.btn { font-family: var(--mono); font-size: 12px; color: var(--ink-soft); background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 8px 13px; cursor: pointer; transition: all .15s ease; }
.btn:hover { color: var(--ink); border-color: var(--violet); }
.btn--primary { color: #fff; background: linear-gradient(90deg, rgba(167, 139, 250, 0.9), rgba(236, 72, 153, 0.85)); border-color: transparent; }
.btn--primary:hover { filter: brightness(1.1); color: #fff; }
.toast { position: fixed; left: 50%; bottom: 26px; transform: translateX(-50%); z-index: 60; background: var(--panel-2); border: 1px solid var(--line); border-radius: 10px; padding: 12px 18px; font-size: 13px; color: var(--ink); box-shadow: 0 16px 50px rgba(0, 0, 0, 0.5); }

@media (max-width: 720px) {
  .kbwrap { grid-template-columns: 1fr; }
  .kbnav { display: none; }
  .kbmain { padding: 22px 18px 70px; }
  .kbsearch { width: 46vw; }
}