/* Shared UI styles for the reader and the library. */
:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --surface-2: #f3f1ec;
  --text: #1f2328;
  --muted: #6b6f76;
  --border: rgba(20, 20, 30, 0.10);
  --accent: #2e6f9e;
  --accent-soft: rgba(46, 111, 158, 0.12);
  --mark: rgba(255, 196, 0, 0.45);
  --danger: #b4412f;
  --shadow: 0 10px 30px rgba(20, 20, 40, 0.12), 0 2px 6px rgba(20, 20, 40, 0.06);
  --radius: 12px;
  --ui-font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  color-scheme: light;
}
:root[data-theme="sepia"] {
  --bg: #f4ecd8;
  --surface: #faf4e6;
  --surface-2: #ece2c9;
  --text: #4a3b2c;
  --muted: #86735c;
  --border: rgba(90, 60, 30, 0.14);
  --accent: #9a5b2c;
  --accent-soft: rgba(154, 91, 44, 0.13);
  --mark: rgba(214, 140, 40, 0.38);
}
:root[data-theme="dark"] {
  --bg: #17191c;
  --surface: #202327;
  --surface-2: #2a2e33;
  --text: #dcd8cf;
  --muted: #8e939a;
  --border: rgba(255, 255, 255, 0.09);
  --accent: #7fb2dc;
  --accent-soft: rgba(127, 178, 220, 0.15);
  --mark: rgba(255, 200, 60, 0.35);
  --danger: #e07a66;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.45), 0 2px 6px rgba(0, 0, 0, 0.3);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 var(--ui-font);
  -webkit-font-smoothing: antialiased;
}
button, input, select { font: inherit; color: inherit; }
[hidden] { display: none !important; }

.icon-btn {
  display: inline-grid; place-items: center;
  width: 36px; height: 36px;
  border: 0; border-radius: 9px;
  background: transparent; color: var(--muted);
  cursor: pointer;
  transition: background .15s, color .15s;
}
.icon-btn:hover { background: var(--surface-2); color: var(--text); }
.icon-btn[aria-pressed="true"], .icon-btn.active { color: var(--accent); background: var(--accent-soft); }
.icon-btn svg { width: 20px; height: 20px; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 14px; border-radius: 9px;
  border: 1px solid var(--border); background: var(--surface);
  cursor: pointer; font-weight: 500;
}
.btn:hover { background: var(--surface-2); }
.btn.primary { background: var(--accent); border-color: transparent; color: #fff; }
:root[data-theme="dark"] .btn.primary { color: #10141a; }
.btn.primary:hover { filter: brightness(1.07); }
.btn svg { width: 16px; height: 16px; }

kbd {
  font: 11px/1 ui-monospace, SFMono-Regular, Menlo, monospace;
  padding: 3px 6px; border-radius: 5px;
  background: var(--surface-2); border: 1px solid var(--border);
}

.seg { display: flex; background: var(--surface-2); border-radius: 9px; padding: 3px; gap: 3px; }
.seg button {
  flex: 1; border: 0; background: transparent; padding: 6px 8px; border-radius: 7px;
  cursor: pointer; color: var(--muted); font-weight: 500; white-space: nowrap;
}
.seg button[aria-pressed="true"] { background: var(--surface); color: var(--text); box-shadow: 0 1px 3px rgba(0,0,0,.12); }

.toast {
  position: fixed; left: 50%; bottom: 72px; transform: translateX(-50%) translateY(10px);
  background: var(--text); color: var(--bg); padding: 9px 16px; border-radius: 999px;
  font-weight: 500; opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s; z-index: 100;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.state-card {
  max-width: 520px; margin: 12vh auto 0; padding: 32px 36px; text-align: left;
}
.state-card h1, .state-card h2 { font-size: 20px; margin: 10px 0 8px; }
.state-card p { color: var(--muted); margin: 0 0 14px; }
.state-card .actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 18px; }
.state-card .badge { display: inline-grid; place-items: center; width: 44px; height: 44px; border-radius: 12px; background: var(--accent-soft); color: var(--accent); }
.state-card .badge.err { background: rgba(180, 65, 47, 0.12); color: var(--danger); }
.state-card .badge svg { width: 24px; height: 24px; }
.state-card details { margin-top: 10px; color: var(--muted); font-size: 12px; }
.state-card code { font-size: 12px; word-break: break-all; }
.state-card ol { color: var(--muted); padding-left: 20px; }
.state-card ol li { margin: 4px 0; }
a.btn { text-decoration: none; color: inherit; }
a.btn.primary { color: #fff; }

/* Quire web: a visible keyboard focus ring on every control. */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }