*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #f8f7f4;
  --surface: #ffffff;
  --border: #e5e2db;
  --text: #1a1a1a;
  --text-muted: #6b6860;
  --accent: #c0392b;
  --accent-hover: #96281b;
  --radius: 12px;
  --shadow: 0 1px 4px rgba(0,0,0,.07);
  --tts-h: 160px; /* height of sticky TTS bar on mobile */
}

body {
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  min-height: 100vh;
  font-size: 16px;
}

/* ── Header ── */
header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 1.25rem;
  height: 56px;
  display: flex;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 20;
}
.site-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
}

/* ── Main container ── */
main {
  max-width: 720px;
  margin: 0 auto;
  padding: 1.5rem 1rem 2rem;
}

/* ── Back link ── */
.back-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 .25rem;
  font-size: .95rem;
  color: var(--accent);
  text-decoration: none;
  margin-bottom: .75rem;
}
.back-link:hover { text-decoration: underline; }

/* ── Post header ── */
.post-header { margin-bottom: 1.25rem; }
.post-title { font-size: 1.5rem; font-weight: 700; line-height: 1.3; }
.post-date  { font-size: .88rem; color: var(--text-muted); margin-top: .35rem; display: block; }

/* ── Post content ── */
.post-content {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
  font-size: 1.05rem;
  line-height: 1.85;
  margin-bottom: 1.5rem;
}
.post-content h2 { font-size: 1.2rem; margin: 1.4rem 0 .6rem; }
.post-content h3 { font-size: 1.05rem; margin: 1.2rem 0 .5rem; }
.post-content p  { margin-bottom: 1rem; }
.post-content p:last-child { margin-bottom: 0; }
.post-content ul, .post-content ol { margin: .75rem 0 1rem 1.5rem; }
.post-content li { margin-bottom: .4rem; }
.post-content blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 1rem;
  color: var(--text-muted);
  margin: 1rem 0;
}
.post-content .reading {
  background: #fff8e1;
  border-radius: 4px;
  outline: 2px solid #f9a825;
  outline-offset: 3px;
  transition: background .2s;
}

/* ══════════════════════════════════════
   TTS CONTAINER
   Desktop: блок под статьёй
   Mobile:  sticky снизу
══════════════════════════════════════ */
.tts-container {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .85rem 1rem;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: .6rem;
  margin-bottom: 1.5rem;
}

/* ── Row 1: main buttons ── */
.tts-main {
  display: flex;
  align-items: center;
  gap: .5rem;
  flex-wrap: wrap;
}

.tts-btn {
  border: none;
  border-radius: 8px;
  padding: 0 1.1rem;
  height: 44px;
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s, opacity .15s;
  white-space: nowrap;
}
.tts-btn:disabled { opacity: .38; cursor: not-allowed; }
.tts-play  { background: var(--accent); color: #fff; }
.tts-play:hover:not(:disabled)  { background: var(--accent-hover); }
.tts-pause { background: #f0ede8; color: var(--text); }
.tts-pause:hover:not(:disabled) { background: #e3dfd8; }
.tts-stop  { background: #f0ede8; color: var(--text); }
.tts-stop:hover:not(:disabled)  { background: #e3dfd8; }
.tts-status { font-size: .85rem; color: var(--text-muted); margin-left: auto; }

/* ── Row 2: seek bar ── */
.tts-seek-row {
  display: flex;
  align-items: center;
  gap: .75rem;
}
.seek-bar {
  flex: 1;
  height: 6px;
  -webkit-appearance: none; appearance: none;
  background: var(--border);
  border-radius: 99px;
  cursor: pointer;
  accent-color: var(--accent);
}
.seek-bar::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px; height: 22px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 1px 4px rgba(0,0,0,.25);
}
.seek-bar::-moz-range-thumb {
  width: 22px; height: 22px;
  background: var(--accent);
  border: none; border-radius: 50%;
}
.seek-label {
  font-size: .82rem;
  color: var(--text-muted);
  white-space: nowrap;
  min-width: 3.5rem;
  text-align: right;
}

/* ── Row 3: speed + resume ── */
.tts-bottom {
  display: flex;
  align-items: center;
  gap: .75rem;
  flex-wrap: wrap;
}
.tts-speed { display: flex; gap: .3rem; }
.speed-btn {
  border: 1px solid var(--border);
  background: var(--bg);
  border-radius: 6px;
  padding: 0 .65rem;
  height: 36px;
  font-size: .85rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--text-muted);
  transition: background .12s, color .12s;
  white-space: nowrap;
}
.speed-btn:hover { background: #e8e4de; color: var(--text); }
.speed-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ── Resume hint ── */
.resume-hint {
  display: flex;
  align-items: center;
  gap: .6rem;
  font-size: .85rem;
  color: #6366f1;
  background: #f5f3ff;
  border: 1px solid #ddd6fe;
  border-radius: 8px;
  padding: .5rem .85rem;
  margin-top: .25rem;
}
.resume-hint.hidden { display: none; }
.restart-btn {
  margin-left: auto; border: none;
  background: transparent; color: var(--text-muted);
  font-size: .8rem; cursor: pointer; text-decoration: underline; padding: 0;
}

/* ══════════════════════════════════════
   MOBILE — TTS sticky bottom
══════════════════════════════════════ */
@media (max-width: 768px) {
  main { padding: 1rem .85rem 2rem; }

  .tts-container {
    position: fixed;
    bottom: 0; left: 0; right: 0;
    border-radius: 16px 16px 0 0;
    border-bottom: none;
    padding: .9rem 1rem calc(.9rem + env(safe-area-inset-bottom));
    z-index: 30;
    box-shadow: 0 -4px 24px rgba(0,0,0,.1);
    gap: .5rem;
    margin-bottom: 0;
  }

  /* push content up so it's not hidden by fixed bar */
  .post-content { margin-bottom: calc(var(--tts-h) + 1rem); }

  /* main buttons: equal width, bigger */
  .tts-main { gap: .4rem; }
  .tts-btn { flex: 1; height: 52px; font-size: 1rem; padding: 0; justify-content: center; }
  .tts-status { display: none; } /* shown in button text on mobile */

  /* seek bar: bigger thumb */
  .seek-bar::-webkit-slider-thumb { width: 28px; height: 28px; }
  .seek-bar::-moz-range-thumb     { width: 28px; height: 28px; }
  .seek-bar { height: 6px; }

  /* speed buttons: fill row */
  .tts-speed { flex: 1; gap: .25rem; }
  .speed-btn { flex: 1; height: 40px; font-size: .88rem; padding: 0; }
}

/* ══════════════════════════════════════
   INDEX LIST
══════════════════════════════════════ */
.list-header { margin-bottom: 1.5rem; }
.list-header h1 { font-size: 1.6rem; font-weight: 700; }
.subtitle { color: var(--text-muted); margin-top: .25rem; font-size: .95rem; }
.list-header-row { display: flex; align-items: center; justify-content: space-between; gap: .75rem; flex-wrap: wrap; }
.header-actions { display: flex; gap: .5rem; }
.upload-link, .api-link {
  text-decoration: none;
  padding: 0 1rem;
  height: 44px;
  display: inline-flex; align-items: center;
  border-radius: 8px;
  font-size: .9rem;
  font-weight: 600;
  transition: background .15s;
}
.upload-link { background: var(--accent); color: #fff; }
.upload-link:hover { background: var(--accent-hover); }
.api-link { background: #f0ede8; color: var(--text); border: 1px solid var(--border); }
.api-link:hover { background: #e3dfd8; }

.post-list { list-style: none; display: flex; flex-direction: column; gap: .75rem; }

.post-item {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: box-shadow .15s, border-color .15s;
}
.post-item:active { box-shadow: 0 1px 3px rgba(0,0,0,.08); }
@media (hover: hover) {
  .post-item:hover { box-shadow: 0 3px 12px rgba(0,0,0,.1); border-color: #ccc; }
}

.post-link {
  display: block;
  padding: 1.1rem 3rem 1.1rem 1.25rem; /* right padding for delete btn */
  text-decoration: none;
  color: inherit;
  min-height: 72px;
}

.post-meta {
  display: flex; align-items: center;
  gap: .45rem; margin-bottom: .4rem; flex-wrap: wrap;
}
.post-meta time { font-size: .82rem; color: var(--text-muted); }

.tag {
  font-size: .74rem;
  background: #fde8e6; color: var(--accent);
  border-radius: 4px; padding: .1rem .45rem; font-weight: 600;
}
.tag-api     { background: #eff6ff; color: #1d4ed8; }
.tag-playing { background: #f0fdf4; color: #166534; font-weight: 700; }

.post-item-title {
  font-size: 1.1rem; font-weight: 600;
  color: var(--text); line-height: 1.4;
}
.post-excerpt {
  font-size: .9rem; color: var(--text-muted);
  margin-top: .35rem; line-height: 1.55;
}

.item-progress-bar {
  height: 3px; background: var(--border);
  border-radius: 99px; margin-top: .65rem; overflow: hidden;
}
.item-progress-fill {
  height: 100%; background: var(--accent);
  border-radius: 99px; transition: width .3s;
}

/* ── Delete button ── */
.delete-item-btn {
  position: absolute; top: 50%; right: .75rem;
  transform: translateY(-50%);
  width: 40px; height: 40px;
  border: none; background: transparent; color: #d1d5db;
  font-size: 1.25rem; cursor: pointer;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  transition: background .12s, color .12s;
  -webkit-tap-highlight-color: transparent;
}
.delete-item-btn:hover, .delete-item-btn:active { background: #fee2e2; color: #b91c1c; }

/* ── Toolbar ── */
.list-toolbar {
  display: flex; align-items: center; justify-content: space-between;
  background: #fff8f0; border: 1px solid #fde8cc;
  border-radius: var(--radius); padding: .65rem 1rem;
  margin-bottom: .75rem; gap: .75rem;
}
.list-toolbar.hidden { display: none; }
.toolbar-count { font-size: .85rem; color: var(--text-muted); }
.delete-all-btn {
  border: none; background: #fee2e2; color: #b91c1c;
  border-radius: 8px; padding: 0 .9rem; height: 40px;
  font-size: .85rem; font-weight: 600; cursor: pointer;
  transition: background .15s;
}
.delete-all-btn:hover { background: #fecaca; }

/* ── Pagination ── */
.pagination {
  display: flex; align-items: center; justify-content: center;
  gap: .35rem; margin-top: 1.5rem; flex-wrap: wrap;
}
.page-btn {
  min-width: 44px; height: 44px; padding: 0 .6rem;
  border: 1px solid var(--border); background: var(--surface);
  border-radius: 8px; font-size: .9rem; cursor: pointer;
  transition: background .12s, border-color .12s;
  -webkit-tap-highlight-color: transparent;
}
.page-btn:hover  { background: #f0ede8; border-color: #ccc; }
.page-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); font-weight: 700; }
.page-ellipsis   { color: var(--text-muted); padding: 0 .25rem; line-height: 44px; }

.loading-state { color: var(--text-muted); font-size: .95rem; padding: .5rem 0; }

/* ══════════════════════════════════════
   UPLOAD PAGE
══════════════════════════════════════ */
.upload-header { margin-bottom: 1.5rem; }
.upload-header h1 { font-size: 1.6rem; font-weight: 700; }

.drop-zone {
  display: block;
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  cursor: pointer;
  transition: border-color .15s, background .15s;
  margin-bottom: 1.25rem;
  -webkit-tap-highlight-color: transparent;
}
.drop-zone:hover, .drop-zone.drag-over {
  border-color: var(--accent); background: #fff5f4;
}
.drop-inner {
  display: flex; flex-direction: column;
  align-items: center; gap: .6rem;
  padding: 2.5rem 1rem;
  color: var(--text-muted); font-size: 1rem;
}
.drop-inner svg { opacity: .4; }
.drop-hint { font-size: .85rem; opacity: .7; }

@media (max-width: 768px) {
  .drop-inner { padding: 3rem 1rem; }
  .drop-inner svg { width: 52px; height: 52px; }
}

.error-box {
  background: #fff0f0; border: 1px solid #f5c6c6;
  color: #b91c1c; border-radius: var(--radius);
  padding: .85rem 1rem; font-size: .9rem; margin-bottom: 1rem;
}
.error-box.hidden { display: none; }

.progress-bar {
  position: relative; background: var(--border);
  border-radius: 99px; height: 6px;
  margin-bottom: 1.25rem; overflow: hidden;
}
.progress-bar.hidden { display: none; }
.progress-fill { height: 100%; background: var(--accent); border-radius: 99px; transition: width .2s; width: 0%; }
.progress-text { position: absolute; top: 10px; left: 0; font-size: .78rem; color: var(--text-muted); }

.reader-section.hidden { display: none; }
.reader-meta { display: flex; align-items: center; gap: .75rem; margin-bottom: 1rem; flex-wrap: wrap; }
.pdf-name { font-size: 1rem; font-weight: 600; word-break: break-all; }
.pdf-pages { font-size: .85rem; color: var(--text-muted); }

.summarize-btn {
  margin-left: auto; border: none;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  color: #fff; border-radius: 8px;
  padding: 0 1rem; height: 44px;
  font-size: .9rem; font-weight: 600; cursor: pointer;
  transition: opacity .15s;
}
.summarize-btn:hover:not(:disabled) { opacity: .85; }
.summarize-btn:disabled { opacity: .4; cursor: not-allowed; }

.ai-status {
  display: flex; align-items: center; gap: .6rem;
  font-size: .9rem; color: #6366f1;
  background: #f5f3ff; border: 1px solid #ddd6fe;
  border-radius: var(--radius); padding: .65rem 1rem; margin-bottom: 1rem;
}
.ai-status.hidden { display: none; }
.ai-spinner {
  width: 16px; height: 16px;
  border: 2px solid #c4b5fd; border-top-color: #6366f1;
  border-radius: 50%; animation: spin .7s linear infinite; flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }

.pdf-content { font-size: 1rem; line-height: 1.8; }
.page-label {
  text-align: center; color: var(--text-muted);
  font-size: .82rem; margin: 1.25rem 0 .75rem; letter-spacing: .05em;
}

/* ══════════════════════════════════════
   API DOCS PAGE
══════════════════════════════════════ */
.api-header { margin-bottom: 1.5rem; }
.api-header h1 { font-size: 1.6rem; font-weight: 700; }

.api-base-url {
  display: flex; align-items: center; gap: .75rem;
  background: #f1f5f9; border: 1px solid var(--border);
  border-radius: var(--radius); padding: .75rem 1rem;
  margin-bottom: 2rem; font-size: .9rem; flex-wrap: wrap;
}
.api-base-url .label { font-size: .75rem; font-weight: 700; color: var(--text-muted); text-transform: uppercase; letter-spacing: .05em; }

.endpoint-block {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.25rem;
  margin-bottom: 1.25rem;
}
.endpoint-block h2 { font-size: 1.1rem; font-weight: 700; margin-bottom: .75rem; }
.endpoint-block h3 { font-size: .82rem; font-weight: 700; color: var(--text-muted); text-transform: uppercase; letter-spacing: .04em; margin: 1.1rem 0 .4rem; }
.endpoint-block p  { font-size: .92rem; color: var(--text-muted); margin-bottom: .5rem; }

.endpoint-title { display: flex; align-items: center; gap: .6rem; margin-bottom: .85rem; flex-wrap: wrap; }
.method { font-size: .75rem; font-weight: 800; padding: .2rem .55rem; border-radius: 5px; letter-spacing: .04em; }
.method.get  { background: #dcfce7; color: #166534; }
.method.post { background: #dbeafe; color: #1e40af; }
.badge-public { font-size: .72rem; background: #f0fdf4; color: #166534; border: 1px solid #bbf7d0; border-radius: 4px; padding: .1rem .45rem; font-weight: 600; }
.badge-auth   { font-size: .72rem; background: #fef3c7; color: #92400e; border: 1px solid #fde68a; border-radius: 4px; padding: .1rem .45rem; font-weight: 600; }

.code-block { background: #1e1e2e; color: #cdd6f4; border-radius: 8px; padding: .9rem 1rem; font-size: .82rem; overflow-x: auto; margin: .4rem 0 .75rem; white-space: pre; }

.api-table { width: 100%; border-collapse: collapse; font-size: .88rem; margin: .4rem 0 .5rem; display: block; overflow-x: auto; }
.api-table th { background: #f8f7f4; text-align: left; padding: .5rem .75rem; font-weight: 600; border-bottom: 1px solid var(--border); white-space: nowrap; }
.api-table td { padding: .5rem .75rem; border-bottom: 1px solid #f1ede7; vertical-align: top; }
.api-table code { font-size: .82rem; background: #f1f5f9; padding: .1rem .3rem; border-radius: 3px; }

.try-btn {
  border: none; background: var(--accent); color: #fff;
  border-radius: 8px; padding: 0 1rem; height: 44px;
  font-size: .9rem; font-weight: 600; cursor: pointer;
  margin-top: .25rem; transition: background .15s;
}
.try-btn:hover { background: var(--accent-hover); }

.result-block { background: #1e1e2e; color: #a6e3a1; border-radius: 8px; padding: .9rem 1rem; font-size: .8rem; overflow-x: auto; margin-top: .75rem; white-space: pre; }
.result-block.hidden { display: none; }

.try-form { display: flex; flex-direction: column; gap: .75rem; margin-top: .5rem; }
.try-form label { display: flex; flex-direction: column; gap: .3rem; font-size: .88rem; font-weight: 600; color: var(--text-muted); }
.try-form input, .try-form textarea {
  border: 1px solid var(--border); border-radius: 8px;
  padding: .65rem .85rem; font-size: 1rem;
  font-family: inherit; background: var(--bg); resize: vertical;
  min-height: 44px;
}
.try-form input:focus, .try-form textarea:focus {
  outline: 2px solid var(--accent); outline-offset: 1px;
}