:root {
  --bg: #f1f5f9; --card: #ffffff; --ink: #0f172a; --muted: #64748b;
  --line: #e2e8f0; --brand: #2563eb; --brand-ink:#fff;
  --danger:#b91c1c; --danger-bg:#fef2f2; --ok:#15803d; --ok-bg:#f0fdf4; --warn:#b45309; --warn-bg:#fffbeb;
  --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root { --bg:#0b1220; --card:#111a2e; --ink:#e5eaf3; --muted:#94a3b8; --line:#1e293b;
          --brand:#3b82f6; --danger:#fca5a5; --danger-bg:#2a1414; --ok:#86efac; --ok-bg:#0f2417;
          --warn:#fcd34d; --warn-bg:#2a2010; }
}
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
[hidden] { display: none !important; }   /* atribut hidden harus menang atas .login/.viewer */
html,body { margin:0; padding:0; }
body {
  background: var(--bg); color: var(--ink);
  font: 15px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans KR", sans-serif;
  padding-top: env(safe-area-inset-top); padding-bottom: env(safe-area-inset-bottom);
}
.muted { color: var(--muted); }
button { font: inherit; cursor: pointer; }

/* Login */
.login { min-height: 100dvh; display:grid; place-items:center; padding:24px; }
.login-card { background:var(--card); border:1px solid var(--line); border-radius:var(--radius);
  padding:28px 24px; width:min(380px,100%); box-shadow:0 10px 40px rgba(0,0,0,.08); text-align:center; }
.logo-hero { width:76px; height:76px; border-radius:18px; display:block; margin:0 auto 12px;
  box-shadow:0 6px 18px rgba(37,99,235,.35); }
.logo-mini { width:24px; height:24px; border-radius:6px; vertical-align:-6px; }
.brand { font-size:22px; font-weight:700; }
.login-card p { margin:6px 0 18px; }
.login-card input { width:100%; padding:13px 14px; border:1px solid var(--line); border-radius:10px;
  background:transparent; color:var(--ink); font-size:16px; margin-bottom:12px; }
.login-card button { width:100%; padding:13px; border:0; border-radius:10px; background:var(--brand);
  color:var(--brand-ink); font-weight:600; font-size:16px; }
.error { color:var(--danger); margin:12px 0 0; }

/* App shell */
.topbar { position:sticky; top:0; z-index:5; display:flex; align-items:center; justify-content:space-between;
  padding:12px 16px; background:var(--card); border-bottom:1px solid var(--line); }
.title { font-weight:700; display:flex; gap:8px; align-items:center; }
.ghost { background:transparent; border:1px solid var(--line); color:var(--ink); padding:7px 12px;
  border-radius:9px; }
.tabs { position:sticky; top:49px; z-index:4; display:flex; gap:4px; padding:8px 12px; background:var(--bg);
  overflow-x:auto; border-bottom:1px solid var(--line); }
.tabs button { flex:0 0 auto; border:0; background:transparent; color:var(--muted); padding:8px 14px;
  border-radius:999px; font-weight:600; }
.tabs button.active { background:var(--brand); color:var(--brand-ink); }
main { padding:16px; max-width:820px; margin:0 auto; }
.foot { text-align:center; color:var(--muted); font-size:12px; padding:18px; }
.loading { text-align:center; color:var(--muted); padding:40px; }

.pill { font-size:11px; font-weight:700; padding:2px 8px; border-radius:999px; }
.pill.offline { background:var(--warn-bg); color:var(--warn); }

/* Cards */
.card { background:var(--card); border:1px solid var(--line); border-radius:var(--radius); padding:16px;
  margin-bottom:14px; }
.card h2 { margin:0 0 10px; font-size:16px; }
.grid { display:grid; gap:10px; }
.fact { display:flex; justify-content:space-between; gap:12px; padding:7px 0; border-bottom:1px dashed var(--line); }
.fact:last-child { border-bottom:0; }
.fact b { font-weight:600; }
.hl { display:flex; gap:8px; align-items:flex-start; padding:9px 11px; border-radius:10px; margin-bottom:8px; font-size:14px; }
.hl.danger { background:var(--danger-bg); color:var(--danger); }
.hl.ok { background:var(--ok-bg); color:var(--ok); }
.hl.warn { background:var(--warn-bg); color:var(--warn); }

.section-title { font-size:13px; text-transform:uppercase; letter-spacing:.04em; color:var(--muted);
  margin:18px 4px 8px; }
.doc { display:flex; align-items:center; gap:12px; background:var(--card); border:1px solid var(--line);
  border-radius:12px; padding:13px 14px; margin-bottom:9px; width:100%; text-align:left; color:var(--ink); }
.doc .ico { font-size:22px; flex:0 0 auto; }
.doc .meta { min-width:0; flex:1; }
.doc .meta .t { font-weight:600; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.doc .meta .n { color:var(--muted); font-size:12.5px; }
.doc .chev { color:var(--muted); }

/* Markdown */
.md { background:var(--card); border:1px solid var(--line); border-radius:var(--radius); padding:18px; }
.md h1 { font-size:20px; } .md h2 { font-size:17px; margin-top:22px; }
.md h3 { font-size:15px; } .md table { width:100%; border-collapse:collapse; display:block; overflow-x:auto; }
.md th,.md td { border:1px solid var(--line); padding:6px 9px; text-align:left; font-size:13.5px; }
.md code { background:rgba(127,127,127,.15); padding:1px 5px; border-radius:5px; font-size:13px; }
.md pre { position:relative; background:rgba(127,127,127,.12); padding:14px; border-radius:10px; overflow-x:auto; }
.md pre code { background:none; padding:0; white-space:pre; }
.md blockquote { border-left:3px solid var(--brand); margin:12px 0; padding:2px 14px; color:var(--muted); }
.md a { color:var(--brand); }
.copy-btn { position:absolute; top:8px; right:8px; background:var(--brand); color:#fff; border:0;
  border-radius:8px; padding:5px 11px; font-size:12px; font-weight:600; }

/* Viewer */
.viewer { position:fixed; inset:0; z-index:20; background:var(--bg); display:flex; flex-direction:column; }
.viewer-bar { display:flex; align-items:center; gap:10px; padding:10px 12px; background:var(--card);
  border-bottom:1px solid var(--line); }
.viewer-title { flex:1; font-weight:600; font-size:14px; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.viewer-body { flex:1; overflow:auto; padding:12px; text-align:center; }
.viewer-body img { max-width:100%; height:auto; border-radius:8px; }
.viewer-body canvas { max-width:100%; height:auto; margin:0 auto 12px; display:block;
  box-shadow:0 2px 12px rgba(0,0,0,.15); background:#fff; }
.viewer-body .md { text-align:left; max-width:800px; margin:0 auto; }

.toast { position:fixed; bottom:24px; left:50%; transform:translateX(-50%); background:#0f172a; color:#fff;
  padding:10px 18px; border-radius:999px; font-size:14px; z-index:40; box-shadow:0 6px 20px rgba(0,0,0,.3); }