:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-2: #1e222b;
  --border: #2a2f3a;
  --text: #e6e8ee;
  --muted: #9aa3b2;
  --accent: #4c8dff;
  --accent-2: #3a72d4;
  --mark: #ffd54a;
  --danger: #ff5c5c;
  --radius: 1px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.5;
}

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

button {
  font: inherit;
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  padding: 9px 14px;
  border-radius: 1px;
  transition: background 0.15s, border-color 0.15s;
}
button:hover { background: #262b36; }
button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
button.primary:hover { background: var(--accent-2); }

input, select {
  font: inherit;
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 1px;
  padding: 10px 12px;
  outline: none;
}
input:focus, select:focus { border-color: var(--accent); }

mark {
  background: var(--mark);
  color: #1a1a1a;
  padding: 0 2px;
  border-radius: 1px;
}

/* ---------- Login ---------- */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.login-card {
  width: 100%;
  max-width: 380px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 32px 28px;
  text-align: center;
}
.login-card .brand-mark {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 2px;
}
.login-card h1 { font-size: 18px; font-weight: 600; margin: 0 0 4px; }
.login-card p.sub { color: var(--muted); margin: 0 0 24px; font-size: 13px; }
.login-card label { display: block; text-align: left; font-size: 13px; color: var(--muted); margin: 14px 0 6px; }
.login-card input { width: 100%; }
.login-card button { width: 100%; margin-top: 22px; }
.error { color: var(--danger); font-size: 13px; margin-top: 12px; min-height: 18px; }

/* ---------- App shell ---------- */
.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar .brand { font-weight: 600; }
.topbar .brand small { color: var(--muted); font-weight: 400; margin-left: 8px; }
.topbar .spacer { flex: 1; }
.topbar .user { color: var(--muted); font-size: 13px; }

.container { max-width: 1000px; margin: 0 auto; padding: 24px 20px 60px; }

.search-row { display: flex; gap: 10px; margin-bottom: 6px; }
.search-row input { flex: 1; font-size: 16px; }
.search-meta { color: var(--muted); font-size: 13px; margin: 10px 2px 18px; }

.result {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-bottom: 12px;
  transition: border-color 0.15s, transform 0.05s;
}
.result:hover { border-color: var(--accent); }
.result .head { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }
.badge {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 1px;
}
.result .snippet { color: #d3d8e2; font-size: 14px; }
.result .snippet-en { margin-top: 8px; padding-top: 8px; border-top: 1px dashed var(--border); color: #b9c6da; }
.lang-tag {
  display: inline-block; font-size: 11px; font-weight: 600; color: var(--muted);
  border: 1px solid var(--border); border-radius: 1px; padding: 0 5px; margin-right: 6px;
  vertical-align: middle;
}
.result .open { margin-left: auto; }

.parts-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; margin-top: 8px; }
.part-card {
  display: block;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  color: var(--text);
}
.part-card:hover { border-color: var(--accent); text-decoration: none; }
.part-card .n { font-size: 22px; font-weight: 700; }
.part-card .p { color: var(--muted); font-size: 13px; }

.section-title { font-size: 13px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin: 28px 2px 10px; }
.empty { color: var(--muted); padding: 30px 4px; }

/* ---------- Viewer ---------- */
.viewer-body { display: flex; flex-direction: column; height: 100%; }
.viewer-toolbar {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 16px; background: var(--panel); border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.viewer-toolbar .spacer { flex: 1; }
.viewer-toolbar input.page { width: 70px; text-align: center; }
.viewer-scroll { flex: 1; overflow: auto; background: #0a0c10; padding: 20px; }
#pageContainer { display: flex; flex-direction: column; align-items: center; gap: 16px; }
.page-canvas-wrap { position: relative; box-shadow: var(--shadow); background: #fff; }
canvas.pdfpage { display: block; }
.loading { color: var(--muted); padding: 40px; text-align: center; }
.finder-input { width: 200px; }