:root {
  --bg: #f4f1ea;
  --card: #ffffff;
  --ink: #2b2b2b;
  --muted: #8a8a8a;
  --accent: #c0392b;
  --accent-soft: #e8d9d6;
  --border: #ddd;
  --radius: 14px;
  --shadow: 0 2px 10px rgba(0,0,0,.08);
}
:root[data-theme="dark"] {
  --bg: #1a1714;
  --card: #2a2522;
  --ink: #ece5d8;
  --muted: #8d847a;
  --accent: #e85d4a;
  --accent-soft: #4a2620;
  --border: #3a3530;
  --shadow: 0 2px 10px rgba(0,0,0,.4);
}
:root[data-theme="dark"] body { background: var(--bg); color: var(--ink); }
:root[data-theme="dark"] .card,
:root[data-theme="dark"] .add-user input,
:root[data-theme="dark"] .login-box input,
:root[data-theme="dark"] #search,
:root[data-theme="dark"] .genre-select,
:root[data-theme="dark"] .tab,
:root[data-theme="dark"] .btn-soft,
:root[data-theme="dark"] .btn-round,
:root[data-theme="dark"] .modal-card,
:root[data-theme="dark"] .vol-popup,
:root[data-theme="dark"] .discovery,
:root[data-theme="dark"] .ab-item,
:root[data-theme="dark"] .user-row,
:root[data-theme="dark"] .player-desc {
  background: var(--card); color: var(--ink); border-color: var(--border);
}
:root[data-theme="dark"] .modal-actions .modal-ok:not(.danger) { background: #555; }
:root[data-theme="dark"] .modal-actions .modal-ok:not(.danger):hover { background: #6a6a6a; }
:root[data-theme="dark"] .badge-done { background: #1e5e22; }
:root[data-theme="dark"] .card-progress-track { background: rgba(255,255,255,.10); }

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  font-family: -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg); color: var(--ink);
  -webkit-tap-highlight-color: transparent;
}
.hidden { display: none !important; }
.view { max-width: 1100px; margin: 0 auto; padding: 16px; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.error { color: var(--accent); }

/* Topbar */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; margin-bottom: 8px;
}
.topbar h1 { font-size: 1.4rem; margin: 0; }
.brand { display: inline-flex; align-items: center; gap: 10px; }
#brand-shelf { cursor: pointer; user-select: none; }
#brand-shelf:hover .brand-logo { transform: scale(1.05); transition: transform .15s; }
.brand-logo { width: 36px; height: auto; display: block; }
.login-box .brand-logo { width: 56px; }

/* Icon buttons (zarovnání SVG + textu uvnitř tlačítek) */
button .ic { vertical-align: middle; display: inline-block; }
.btn-ghost .ic, .btn-soft .ic, .btn-round .ic, .tab .ic { margin-right: 6px; }
.btn-ghost.icon-only .ic, .btn-icon .ic { margin: 0; }

/* Activity feed — co poslouchá rodina */
.activity-user { margin: 22px 0 8px; }
.activity-user-head {
  display: flex; align-items: center; gap: 12px; margin: 16px 0 4px;
  padding-bottom: 8px; border-bottom: 1px solid #e4dfd6;
}
.activity-avatar {
  width: 40px; height: 40px; border-radius: 50%; background: var(--accent-soft);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.05rem; font-weight: 700; color: var(--accent);
}
.activity-user-name { font-size: 1.15rem; font-weight: 600; }
.activity-section { margin: 10px 0 6px; }
.activity-section-title {
  font-size: .92rem; color: var(--muted); margin: 0 0 6px; font-weight: 500;
}
.activity-row {
  display: flex; gap: 12px; padding: 4px 2px 12px;
  overflow-x: auto; scroll-snap-type: x mandatory;
}
.activity-row::-webkit-scrollbar { height: 6px; }
.activity-row::-webkit-scrollbar-thumb { background: rgba(0,0,0,.15); border-radius: 3px; }
.mini-book {
  flex: 0 0 110px; cursor: pointer; scroll-snap-align: start;
  transition: transform .1s;
}
.mini-book:hover { transform: translateY(-3px); }
.mini-book .mini-cover {
  width: 110px; height: 110px; object-fit: cover;
  border-radius: var(--radius); box-shadow: var(--shadow);
  background: var(--accent-soft); display: block;
}
.mini-book .mini-title {
  font-size: .82rem; line-height: 1.2; margin-top: 6px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden; word-break: break-word;
}
.mini-book .mini-author { font-size: .72rem; color: var(--muted); margin-top: 1px; }
.mini-book .mini-pct {
  font-size: .7rem; color: var(--accent); margin-top: 2px; font-weight: 600;
}
.activity-empty-row { color: var(--muted); font-size: .85rem; padding: 4px 0; }

/* Users page — správa přístupů */
.add-user {
  display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0 12px;
  background: var(--card); padding: 14px; border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.add-user input {
  flex: 1 1 200px; padding: 11px 12px; border: 1px solid #ddd;
  border-radius: var(--radius); font-size: 1rem;
}
.add-user button { padding: 11px 18px; width: auto; font-size: 1rem; }
.users-list { display: flex; flex-direction: column; gap: 8px; margin-top: 12px; }
.user-row {
  display: flex; align-items: center; gap: 14px;
  background: var(--card); padding: 12px 16px; border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.user-row .who { flex: 1; min-width: 0; }
.user-row .who b { display: block; }
.user-row .who small { color: var(--muted); }
.user-row .tag {
  font-size: .72rem; padding: 2px 8px; border-radius: 8px; font-weight: 700;
  background: #2e7d32; color: #fff;
}
.user-row .tag.owner { background: var(--accent); }

/* About view — představení Knihotrona */
.about-wrap {
  max-width: 720px; margin: 12px auto 40px; text-align: center;
}
#about-robot {
  width: 260px; height: auto; display: block; margin: 8px auto 24px;
  animation: bob 3.4s ease-in-out infinite;
}
#about-robot #robot-body { transform-origin: 100px 110px; }
#eye-l, #eye-r {
  transform-origin: center;
  transform-box: fill-box;
  animation: blink 5.5s ease-in-out infinite;
}
#eye-r { animation-delay: .05s; }   /* mrkání není dokonale symetrické */
.wave {
  opacity: 0; transform-origin: center; transform-box: fill-box;
  animation: wave 2.4s ease-out infinite;
}
.wave.w2 { animation-delay: .8s; }
.wave.w3 { animation-delay: 1.6s; }

@keyframes bob {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-7px); }
}
@keyframes blink {
  0%, 92%, 100% { transform: scaleY(1); }
  94%, 97%      { transform: scaleY(0.1); }
}
@keyframes wave {
  0%   { opacity: .6; transform: scale(.4); }
  100% { opacity: 0;  transform: scale(2.4); }
}

.about-wrap h2 { font-size: 1.7rem; margin: 0 0 6px; }
.about-lead { font-size: 1.05rem; color: var(--ink); margin: 6px 0 28px; line-height: 1.5; }
.about-features {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px; margin: 0 auto 28px;
}
.ab-item {
  background: var(--card); padding: 14px 16px; border-radius: var(--radius);
  box-shadow: var(--shadow); text-align: left; font-size: .95rem; line-height: 1.4;
}
.ab-item b { display: inline-block; margin-bottom: 4px; }
.ab-emo { font-size: 1.4rem; margin-right: 6px; vertical-align: middle; }
.about-footer { margin-top: 20px; }

/* Modal */
.modal { position: fixed; inset: 0; z-index: 1000; display: flex;
  align-items: center; justify-content: center; padding: 20px; }
.modal.hidden { display: none; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(0,0,0,.45);
  animation: fadeIn .15s ease; }
.modal-card { position: relative; background: var(--card); border-radius: var(--radius);
  padding: 22px 24px; max-width: 420px; width: 100%;
  box-shadow: 0 18px 48px rgba(0,0,0,.25); animation: popIn .18s ease; }
.modal-head { display: flex; align-items: center; gap: 12px; margin-bottom: 6px; }
.modal-logo { width: 42px; height: 42px; flex-shrink: 0; }
.modal-head h2 { margin: 0; font-size: 1.1rem; line-height: 1.2; }
.modal-msg { margin: 6px 0 22px; color: var(--ink); line-height: 1.4; }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; flex-wrap: wrap; }
.modal-actions button { padding: 11px 18px; font-size: 1rem; border-radius: var(--radius); }
.modal-actions .modal-ok { width: auto; background: #3a3a3a; color: #fff; }
.modal-actions .modal-ok:hover { background: #555; }
.modal-actions .modal-ok.danger { background: var(--accent); }
.modal-actions .modal-ok.danger:hover { background: #a32a1d; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes popIn {
  from { transform: translateY(6px) scale(.97); opacity: 0; }
  to   { transform: none; opacity: 1; }
}
.topbar-actions { display: flex; align-items: center; gap: 10px; }
.user-name { color: var(--muted); font-size: .9rem; }

/* Buttons */
button { font: inherit; cursor: pointer; border: none; }
.btn-primary {
  background: var(--accent); color: #fff; padding: 14px; font-size: 1.1rem;
  border-radius: var(--radius); width: 100%;
}
.btn-ghost {
  background: transparent; color: var(--ink); padding: 10px 14px;
  border-radius: var(--radius); font-size: 1rem;
}
.btn-ghost:hover { background: rgba(0,0,0,.05); }
.heart { font-size: 1.5rem; }
.card-heart, #btn-fav { color: #777; transition: color .15s; }
.card-heart.is-fav, #btn-fav.is-fav { color: var(--accent); }
.card-heart:hover, #btn-fav:hover { color: var(--accent); }
.card-cover.placeholder { color: var(--muted); }
.badge-ready .ic { display: block; }

/* Login */
.login-box {
  max-width: 360px; margin: 12vh auto 0; background: var(--card);
  padding: 28px; border-radius: var(--radius); box-shadow: var(--shadow);
  display: flex; flex-direction: column; gap: 14px;
}
.login-box h1 { text-align: center; margin: 0 0 8px; }
.login-box input {
  padding: 14px; font-size: 1.1rem; border: 1px solid #ddd;
  border-radius: var(--radius); width: 100%;
}
.login-box.sent input,
.login-box.sent button[type="submit"],
.login-box.sent > p.muted:not(.small) { display: none; }

/* Discovery progress */
.discovery {
  background: var(--card); border-radius: var(--radius); padding: 10px 14px;
  box-shadow: var(--shadow); margin: 4px 0 12px;
}
.discovery.hidden { display: none; }
.discovery-row {
  display: flex; justify-content: space-between; align-items: center;
  gap: 12px; margin-bottom: 6px; font-size: .95rem;
}
.discovery-count { color: var(--muted); font-variant-numeric: tabular-nums; }
.discovery-track {
  height: 6px; background: rgba(0,0,0,.08); border-radius: 4px; overflow: hidden;
}
.discovery-fill {
  height: 100%; width: 0; background: var(--accent); transition: width .3s ease;
}
.discovery-fill.indeterminate {
  width: 35% !important;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  animation: indeterm 1.4s linear infinite;
}
@keyframes indeterm {
  0%   { transform: translateX(-100%); }
  100% { transform: translateX(370%); }
}

/* Controls */
.controls { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 20px; align-items: stretch; }
#search {
  flex: 1 1 180px; min-width: 0; padding: 11px 12px 11px 38px; font-size: 1rem;
  border: 1px solid #ddd; border-radius: var(--radius); background-color: var(--card);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23888' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><circle cx='11' cy='11' r='8'/><line x1='21' y1='21' x2='16.65' y2='16.65'/></svg>");
  background-repeat: no-repeat;
  background-position: 12px center;
  background-size: 16px;
}
.genre-select {
  appearance: none; -webkit-appearance: none; -moz-appearance: none;
  padding: 11px 28px 11px 12px; font-size: .95rem; border: 1px solid #ddd;
  border-radius: var(--radius); min-width: 130px;
  background-color: var(--card);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23777' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><polyline points='6 9 12 15 18 9'/></svg>");
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 14px;
  cursor: pointer;
  transition: border-color .15s, background-color .15s, color .15s;
}

/* Aktivní filtry – jasná vizuální stopa */
#search:not(:placeholder-shown),
.genre-select.is-active {
  border-color: var(--accent);
  background-color: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
}
#search { transition: border-color .15s, background-color .15s, color .15s; }
/* lupa v searchi se zbarví do accent, když je něco napsáno */
#search:not(:placeholder-shown) {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23c0392b' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'><circle cx='11' cy='11' r='8'/><line x1='21' y1='21' x2='16.65' y2='16.65'/></svg>");
}
/* a chevron v selectu taky */
.genre-select.is-active {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23c0392b' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'><polyline points='6 9 12 15 18 9'/></svg>");
}
.filter-tabs { display: flex; gap: 6px; }
.tab {
  background: var(--card); padding: 10px 14px; border-radius: var(--radius);
  font-size: .95rem; box-shadow: var(--shadow); white-space: nowrap;
}
.tab.active { background: var(--accent); color: #fff; }

/* Grid */
.grid {
  display: grid; gap: 18px;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
}
.card {
  background: var(--card); border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow); cursor: pointer; position: relative;
  transition: transform .1s;
}
.card:hover { transform: translateY(-3px); }
.card-cover {
  width: 100%; aspect-ratio: 1/1; object-fit: cover; background: var(--accent-soft);
  display: block;
}
.card-cover.placeholder {
  display: flex; align-items: center; justify-content: center;
  font-size: 3rem; color: var(--muted);
}
.card-body { padding: 10px 12px 14px; }
.card-title { font-weight: 600; font-size: .98rem; line-height: 1.25; }
.card-author { color: var(--muted); font-size: .82rem; margin-top: 3px; }
.card-heart {
  position: absolute; top: 6px; right: 6px;
  background: rgba(255,255,255,.85); border-radius: 50%; width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
}
.card-heart svg { width: 16px; height: 16px; }
.card.not-ready .card-cover { opacity: .45; transition: opacity .2s; }
.card.not-ready:hover .card-cover { opacity: .65; }
.badge-new {
  position: absolute; top: 8px; left: 8px; background: #2e7d32; color: #fff;
  font-size: .72rem; padding: 3px 10px; border-radius: 10px; font-weight: 700;
  letter-spacing: .03em;
}
.card-progress-track {
  position: absolute; bottom: 0; left: 0; right: 0; height: 7px;
  background: rgba(0,0,0,.15);
}
.card-progress-fill { height: 100%; background: var(--accent); min-width: 7px; }
.badge-done {
  position: absolute; top: 8px; left: 8px; background: #2e7d32; color: #fff;
  font-size: .72rem; padding: 3px 8px; border-radius: 10px;
}
.badge-playing {
  position: absolute; top: 8px; left: 8px; background: var(--accent); color: #fff;
  font-size: .72rem; padding: 3px 8px; border-radius: 10px; font-weight: 600;
}
.badge-ready {
  position: absolute; bottom: 12px; right: 8px; background: rgba(46,125,50,.92);
  color: #fff; width: 22px; height: 22px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: .8rem; font-weight: 700;
}
.empty { text-align: center; color: var(--muted); margin-top: 40px; }

/* Player */
.player { max-width: 820px; margin: 8px auto 40px; }
.player-main {
  display: flex; gap: 28px; align-items: flex-start;
  max-width: 760px; margin: 0 auto;
}
.cover-wrap { position: relative; flex: 0 0 240px; }
.player-cover {
  width: 240px; height: 240px; max-width: 100%;
  aspect-ratio: 1/1; object-fit: cover;
  border-radius: var(--radius); box-shadow: var(--shadow); background: var(--accent-soft);
}
.player-info { flex: 1; min-width: 0; }
.player-desc-wrap { max-width: 720px; margin: 28px auto 0; padding: 0 4px; }
.loading {
  position: absolute; inset: 0; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 12px;
  background: rgba(0,0,0,.55); border-radius: var(--radius); color: #fff;
}
.loading.hidden { display: none; }
.loading-text { font-size: .95rem; }
.spinner {
  width: 46px; height: 46px; border: 5px solid rgba(255,255,255,.3);
  border-top-color: #fff; border-radius: 50%; animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
#player-title { margin: 0 0 4px; font-size: 1.45rem; line-height: 1.2; }
#player-author { margin: 0 0 18px; }
.player-desc {
  text-align: left; margin: 0;
  font-size: .94rem; line-height: 1.55; color: var(--ink);
  background: var(--card); padding: 14px 16px; border-radius: var(--radius);
  box-shadow: var(--shadow); white-space: pre-wrap;
}
.player-desc.collapsed {
  display: -webkit-box; -webkit-line-clamp: 4; -webkit-box-orient: vertical;
  overflow: hidden; padding-bottom: 12px;
}
.desc-toggle { font-size: .85rem; color: var(--accent); padding: 4px 8px; margin-top: 4px; }
.time-row { display: flex; align-items: center; gap: 10px; margin: 4px 0 8px; }
.time-row span { font-variant-numeric: tabular-nums; color: var(--muted); width: 48px; font-size: .9rem; }
#seek { flex: 1; height: 6px; accent-color: var(--accent); }
.play-controls { display: flex; align-items: center; justify-content: center; gap: 18px; margin-top: 14px; }
/* Spodní řada drobných ovládačů (hlasitost + sleep timer) */
.aux-row {
  display: flex; justify-content: center; align-items: center;
  gap: 18px; margin: 12px 0 4px;
}
/* Hlasitost: diskrétní ikonka, vertikální slider v popupu */
.vol-wrap {
  position: relative; display: flex; justify-content: center;
}
.btn-vol {
  background: transparent; padding: 4px 8px; cursor: pointer;
  color: #888; opacity: .65; transition: opacity .15s, color .15s;
  display: inline-flex; align-items: center; line-height: 1;
}
.btn-vol:hover, .btn-vol.is-open { opacity: 1; color: var(--accent); }
.vol-popup {
  position: absolute; bottom: 100%; left: 50%; transform: translateX(-50%);
  background: var(--card); padding: 12px 8px 8px; border-radius: var(--radius);
  box-shadow: 0 6px 20px rgba(0,0,0,.18); margin-bottom: 6px;
  display: flex; flex-direction: column; align-items: center; z-index: 10;
}
.vol-popup.hidden { display: none; }
/* Nativní vertikální slider (Chrome/Edge via slider-vertical; FF přes orient=vertical) */
.vol-popup #volume {
  appearance: slider-vertical; -webkit-appearance: slider-vertical;
  writing-mode: bt-lr; /* bottom-to-top fallback */
  width: 26px; height: 120px; accent-color: var(--accent);
  cursor: pointer;
}
/* Sleep timer popup – stejný stavební kámen jako volume */
.sleep-wrap { position: relative; }
.sleep-popup {
  position: absolute; bottom: 100%; left: 50%; transform: translateX(-50%);
  background: var(--card); padding: 8px; border-radius: var(--radius);
  box-shadow: 0 6px 20px rgba(0,0,0,.18); margin-bottom: 6px;
  display: flex; flex-direction: column; align-items: stretch;
  min-width: 170px; z-index: 10;
}
.sleep-popup.hidden { display: none; }
.sleep-title {
  font-size: .85rem; color: var(--muted); padding: 4px 8px 8px;
}
.sleep-opt {
  background: transparent; border: 0; padding: 8px 12px; font-size: .9rem;
  text-align: left; cursor: pointer; border-radius: 8px; color: var(--ink);
}
.sleep-opt:hover { background: var(--accent-soft); }
.sleep-cancel { color: var(--accent); font-weight: 600; margin-top: 4px;
  border-top: 1px solid var(--border); border-radius: 0 0 8px 8px; }
.btn-vol.is-active { color: var(--accent); opacity: 1; }
.btn-vol .sleep-time {
  font-size: .75rem; margin-left: 4px; font-variant-numeric: tabular-nums;
  font-weight: 600;
}
.btn-play {
  background: var(--accent); color: #fff; width: 76px; height: 76px;
  border-radius: 50%; font-size: 2rem; line-height: 1;
  display: inline-flex; align-items: center; justify-content: center;
}

/* Player – mobil: stack pod sebou, kompaktnější cover ať se play vleze nad fold */
@media (max-width: 720px) {
  /* Na mobilu skryjeme název "Knihotron" i jméno uživatele v topbaru,
     aby se vešla všechna tlačítka (logo zůstává jako klikací prvek). */
  #view-shelf .topbar .brand-text { display: none; }
  #view-shelf .topbar #user-name { display: none; }
  .player { padding: 0 4px; }
  .player-main { flex-direction: column; gap: 14px; }
  .cover-wrap { flex: 0 0 auto; align-self: center; }
  .player-cover { width: 170px; height: 170px; }
  .player-info { text-align: center; width: 100%; }
  #player-title { font-size: 1.2rem; margin-top: 4px; }
  #player-author { margin-bottom: 12px; }
  .time-row { margin-top: 8px; }
  .play-controls { gap: 14px; margin-top: 10px; }
  .btn-play { width: 68px; height: 68px; font-size: 1.75rem; }
  .volume-row { max-width: 280px; margin-left: auto; margin-right: auto; }
  .player-actions { justify-content: center; margin-top: 14px; }
  .player-desc-wrap { margin-top: 18px; }
}
.btn-round {
  background: var(--card); padding: 9px 12px; border-radius: var(--radius);
  font-size: .9rem; box-shadow: var(--shadow);
}
.btn-round .ic { width: 16px; height: 16px; }
.player-actions {
  display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-top: 26px;
}
.btn-soft {
  background: var(--card); color: var(--ink); padding: 8px 14px;
  border-radius: var(--radius); font-size: .85rem; box-shadow: var(--shadow);
}
.btn-soft .ic { width: 14px; height: 14px; }
.btn-soft.danger { color: var(--accent); }