:root{
  --bg:#f6f3ee; /* page background */
  --paper:#fffdf7; /* reading surface */
  --ink:#111;
  --muted:#666;
  --accent:#111;
  --base-font-size:19px;
  --base-line-height:1.75;
}

html,body{height:100%}
body{
  font-family:'Source Serif 4',serif;
  margin:0;
  color:var(--ink);
  background-color:var(--bg);
  background-image:
    radial-gradient(rgba(0,0,0,.02) 1px, transparent 1px),
    radial-gradient(rgba(0,0,0,.02) 1px, transparent 1px);
  background-position:0 0, 3px 3px; /* subtle paper grain */
  background-size:6px 6px;
  font-size:var(--base-font-size);
  line-height:var(--base-line-height);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

/* Theme: dark */
[data-theme="dark"]{
  --bg:#121213;
  --paper:#1a1b1c;
  --ink:#e9e9ea;
  --muted:#9a9a9c;
  --accent:#e9e9ea;
}

::selection{background:#fff0a8}

.wrap{max-width:820px;margin:0 auto;padding:20px}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,253,247,.85);backdrop-filter:saturate(1.2) blur(6px);border-bottom:1px solid #ece8e0}
[data-theme="dark"] .site-header{background:rgba(26,27,28,.7);border-bottom-color:#2a2b2d}
.site-header .wrap{display:flex;align-items:center;gap:16px;padding:12px 20px}
.brand{font-family:'Playfair Display',serif;font-weight:700;font-size:22px;letter-spacing:.2px}
.nav{display:flex;gap:8px;margin-left:auto}
.nav .divider{width:1px;background:#e4e0d8;margin:0 6px}
[data-theme="dark"] .nav .divider{background:#2a2b2d}

.reader{
  background:var(--paper);
  padding:32px 28px;
  border-radius:18px;
  border:1px solid #e8e5de;
  box-shadow:
    0 1px 2px rgba(0,0,0,.03),
    0 10px 30px rgba(0,0,0,.06);
}

.article-header h1{font-family:'Playfair Display',serif;font-weight:700;font-size:2.1rem;line-height:1.2;margin:0 0 .4em}
.byline{color:var(--muted);font-size:1rem;margin-bottom:1.2em}

.article-body p{margin:0 0 0.95em}
.article-body h2{font-family:'Playfair Display',serif;font-weight:600;font-size:1.5rem;margin:1.4em 0 .5em}
.article-body h3{font-weight:600;font-size:1.2rem;margin:1.2em 0 .4em}
.article-body ul, .article-body ol{padding-left:1.4em;margin:0 0 1em}
.article-body blockquote{margin:1.2em 0;padding-left:1em;border-left:3px solid #e8e5de;color:#333}
.article-body a{color:#111;text-underline-offset:3px}

.hidden{display:none}

.btn{padding:10px 14px;border:1px solid #ccc;border-radius:999px;background:#fff;cursor:pointer;transition:background .15s ease,border-color .15s ease,opacity .15s ease}
.btn.primary{background:var(--accent);color:#fff;border-color:var(--accent)}
.btn:hover{background:#f5f5f5}
[data-theme="dark"] .btn{background:#222325;border-color:#2a2b2d;color:var(--ink)}
[data-theme="dark"] .btn:hover{background:#2a2b2d}
.btn.link{border:none;background:transparent;padding:8px 10px;color:inherit}
.btn.link:hover{background:rgba(0,0,0,.05)}
[data-theme="dark"] .btn.link:hover{background:rgba(255,255,255,.06)}
.btn.group{display:inline-flex;gap:4px;border:none;background:transparent;padding:0}
.btn.kbd{font-family:system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, "Helvetica Neue", Arial, "Apple Color Emoji", "Segoe UI Emoji";font-weight:600}

.extract-form{display:flex;gap:10px}
.extract-form input{flex:1;padding:12px 14px;border:1px solid #ddd;border-radius:10px;font-size:1rem}
[data-theme="dark"] .extract-form input{background:#1f2021;border-color:#2a2b2d;color:var(--ink)}

mark[data-hl]{background:rgba(255,239,128,.9)}

.form{display:flex;flex-direction:column;gap:12px;max-width:480px;margin:32px auto}
.form label{display:flex;flex-direction:column;font-weight:600;gap:6px}
.form input{padding:12px 14px;border:1px solid #ddd;border-radius:8px;font-size:16px}
.form .actions{display:flex;gap:8px;align-items:center}
.form .actions .spacer{flex:1}
.form-error{color:#b00020;font-size:14px;margin-top:6px;white-space:pre-line}
.notice{color:var(--muted);font-size:14px;margin-bottom:12px}
.linklike{background:none;border:none;color:#111;text-decoration:underline;cursor:pointer;padding:0}

/* Reader controls */
.controls{margin:8px 0 18px}
#message{min-height:20px;color:var(--muted);margin-top:8px}
.article-footer{display:flex;gap:12px;align-items:center;justify-content:space-between;margin-top:16px}

/* Highlight toolbar (if used) */
#hlToolbar{position:fixed;left:50%;transform:translateX(-50%);bottom:20px;background:rgba(255,255,255,.9);backdrop-filter:blur(4px);border:1px solid #e8e5de;border-radius:999px;box-shadow:0 4px 20px rgba(0,0,0,.08);padding:6px 8px}

/* In-reader controls */
.reader-controls{position:fixed;right:18px;bottom:18px;display:flex;gap:6px;background:rgba(255,255,255,.9);backdrop-filter:blur(4px);border:1px solid #e8e5de;border-radius:999px;box-shadow:0 4px 20px rgba(0,0,0,.08);padding:6px}
[data-theme="dark"] .reader-controls{background:rgba(34,35,37,.8);border-color:#2a2b2d}

/* Library list */
#libList{list-style:none;margin:0;padding:0}
#libList li{display:flex;align-items:center;justify-content:space-between;gap:10px;background:var(--paper);border:1px solid #e8e5de;border-radius:12px;padding:12px 14px;margin:10px 0}
#libList li:hover{box-shadow:0 2px 10px rgba(0,0,0,.06)}
#libList .byline{font-size:.95rem;color:var(--muted)}
#libList .btn.link{color:#a33}

/* Small screens */
@media (max-width: 640px){
  .wrap{padding:14px}
  .article-header h1{font-size:1.8rem}
  .reader{padding:24px 18px}
  .nav{gap:4px}
}

/* Footer */
.site-footer{margin-top:28px;padding:18px 0;color:var(--muted);border-top:1px solid #ece8e0}
[data-theme="dark"] .site-footer{border-top-color:#2a2b2d}
.site-footer .wrap{display:flex;align-items:center;gap:12px}
.site-footer .wrap .spacer{flex:1}

/* Font size presets */
body.size-s{--base-font-size:17px;--base-line-height:1.7}
body.size-m{--base-font-size:19px;--base-line-height:1.75}
body.size-l{--base-font-size:21px;--base-line-height:1.8}