:root{
  --bg: #f4f5f9;
  --bg-deep: #f7f9fc;
  --bg-panel: #ffffff;
  --bg-card: #f1f3f7;
  --bg-card-hover: #e8ecf3;
  --ink: #2c3345;
  --ink-dim: #606f8b;
  --ink-faint: #94a3b8;
  --gold: #b3861b;
  --gold-dim: #cca343;
  --teal: #2b8a82;
  --danger: #dc2626;
  --line: #e2e8f0;
  --radius: 10px;
  --serif: 'Noto Serif SC', serif;
  --sans: 'Noto Sans SC', sans-serif;
  --mono: 'JetBrains Mono', monospace;
}

*{ box-sizing: border-box; }

html, body{
  margin:0;
  padding:0;
  background: var(--bg-deep);
  color: var(--ink);
  font-family: var(--sans);
  min-height: 100%;
}

body{
  background-image:
    radial-gradient(circle at 15% 0%, #fef3c7 0%, transparent 50%),
    radial-gradient(circle at 90% 10%, #dbeafe 0%, transparent 40%);
  background-attachment: fixed;
}

#app{
  max-width: 1100px;
  margin: 0 auto;
  padding: 28px 22px 80px;
  animation: fadein .35s ease;
}

@keyframes fadein{
  from{ opacity:0; transform: translateY(6px); }
  to{ opacity:1; transform: translateY(0); }
}

.loading, .error{
  text-align:center;
  padding: 80px 20px;
  color: var(--ink-dim);
  font-family: var(--serif);
  font-size: 1.1rem;
  letter-spacing: .02em;
}
.error{ color: var(--danger); }

/* ---------- topbar ---------- */
.topbar{
  display:flex;
  align-items:center;
  flex-wrap: wrap;
  gap: 16px;
  padding-bottom: 22px;
  margin-bottom: 26px;
  border-bottom: 1px solid var(--line);
}
.topbar h1{
  flex:1;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: .03em;
  margin: 0;
  color: var(--ink);
  overflow:hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.topbar h1::before{
  content: '';
}

.btn{
  font-family: var(--sans);
  font-size: .85rem;
  color: var(--ink);
  background: var(--bg-card);
  border: 1px solid var(--line);
  padding: 9px 16px;
  border-radius: 999px;
  cursor:pointer;
  transition: all .15s ease;
  white-space: nowrap;
}
.btn:hover{ background: var(--bg-card-hover); border-color: var(--gold-dim); color: var(--gold); }
.btn.primary{
  background: var(--gold);
  color: #201a08;
  border-color: var(--gold);
  font-weight: 700;
}
.btn.primary:hover{ background: #e6bc5c; color:#201a08; }
.btn.active{
  background: var(--danger);
  border-color: var(--danger);
  color:#2a0d10;
  font-weight:700;
}
.btn-icon{
  font-family: var(--sans);
  font-size: .85rem;
  color: var(--ink-dim);
  background: none;
  border: none;
  cursor:pointer;
  padding: 6px 4px;
  transition: color .15s ease;
}
.btn-icon:hover{ color: var(--gold); }

/* ---------- home grid : book spines ---------- */
.grid{
  display:grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 18px;
}

.user-card{
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 14px 16px;
  text-align:center;
  cursor:pointer;
  transition: transform .15s ease, background .15s ease, border-color .15s ease;
  position:relative;
}
.user-card::before{
  content:'';
  position:absolute;
  top:0; left:14%;
  width:72%;
  height:3px;
  background: linear-gradient(90deg, transparent, var(--gold-dim), transparent);
  opacity:.6;
}
.user-card:hover{
  transform: translateY(-3px);
  background: var(--bg-card-hover);
  border-color: var(--gold-dim);
}

.avatar{
  width: 56px;
  height: 56px;
  border-radius: 50%;
  margin: 0 auto 12px;
  border: 2px solid rgba(44,38,32,.1);
  box-shadow: 0 0 0 4px rgba(44,38,32,.05), inset 0 0 12px rgba(0,0,0,.15);
}

.user-name{
  font-family: var(--serif);
  font-weight: 500;
  font-size: .95rem;
  color: var(--ink);
  overflow:hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  padding: 0 4px;
}
.user-count{
  font-family: var(--mono);
  font-size: .72rem;
  color: var(--gold-dim);
  margin-top: 4px;
  letter-spacing: .04em;
}

.user-mark-circle{
  position: absolute;
  top: -6px;
  left: -6px;
  width: 18px;
  height: 18px;
  background: var(--danger);
  border-radius: 50%;
  border: 2px solid var(--bg-panel);
  z-index: 2;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* ---------- delete-mode confirm bar ---------- */
.confirm-bar{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 12px;
  background: var(--bg-panel);
  border: 1px solid var(--danger);
  border-radius: var(--radius);
  padding: 12px 18px;
  margin-bottom: 18px;
  position: sticky;
  top: 12px;
  z-index: 5;
}
.confirm-bar.hidden{ display:none; }
#selectedCount{ font-family: var(--mono); font-size: .82rem; color: var(--ink-dim); }

/* ---------- user page: novel list ---------- */
.novel-list{
  display:flex;
  flex-direction: column;
  gap: 14px;
}

.novel-item{
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold-dim);
  border-radius: var(--radius);
  padding: 14px 18px;
  transition: background .15s ease, border-color .15s ease;
}
.novel-item:hover{ background: var(--bg-card); }
.novel-list.delete-mode .novel-item{ cursor: pointer; }
.novel-list.delete-mode .novel-title{ cursor: pointer; }

.novel-header{
  display:flex;
  align-items:baseline;
  gap: 10px;
  flex-wrap: wrap;
}
.novel-checkbox{
  accent-color: var(--danger);
  width: 16px;
  height: 16px;
  cursor:pointer;
  flex-shrink:0;
}
.mark-x{
  color: var(--danger);
  font-weight: 700;
  font-family: var(--mono);
  flex-shrink:0;
}
.novel-title{
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--ink);
  cursor:pointer;
  transition: color .15s ease;
  flex: 1 1 auto;
  min-width: 120px;
}
.novel-title:hover{ color: var(--gold); text-decoration: underline; text-underline-offset: 3px; }
.novel-charcount{
  font-family: var(--mono);
  font-size: .75rem;
  color: var(--teal);
  white-space: nowrap;
}
.novel-desc{
  color: var(--ink-dim);
  font-size: .88rem;
  line-height: 1.6;
  margin-top: 8px;
}
.novel-series{
  margin-top: 8px;
  font-family: var(--mono);
  font-size: .75rem;
  color: var(--teal);
  letter-spacing: .01em;
}

.novel-tags{
  margin-top: 10px;
  display:flex;
  flex-wrap: wrap;
  gap: 6px;
}

/* ---------- highlight on return from novel page ---------- */
.novel-item.highlight{
  border-color: var(--danger);
  box-shadow: 0 0 0 3px rgba(220,38,38,.25);
  transition: border-color 1.2s ease, box-shadow 1.2s ease;
}
.tag{
  font-family: var(--mono);
  font-size: .68rem;
  color: var(--ink-dim);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 2px 8px;
  letter-spacing: .02em;
}

/* ---------- novel content page ---------- */
.novel-content{
  font-family: var(--serif);
  font-size: 1.05rem;
  line-height: 2;
  color: var(--ink);
  white-space: pre-wrap;
  word-break: break-word;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px clamp(16px, 5vw, 56px);
}
.novel-content.mobile-mode{
  font-size: 1.35rem;
  line-height: 2.15;
}

/* ---------- series directory (floating) ---------- */
.fab{
  position: fixed;
  left: 20px;
  bottom: 20px;
  z-index: 20;
  background: var(--gold);
  color: #fffdf7;
  border: none;
  border-radius: 999px;
  padding: 12px 20px;
  font-family: var(--sans);
  font-size: .85rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(44,38,32,.22);
  transition: transform .3s ease, background .15s ease, opacity .3s ease;
}
.fab:hover{ transform: translateY(-2px); background: #96692f; opacity: 1; }

.fab.hide-side {
  transform: translateX(-100%);
  opacity: 0.5;
}

.fab.edit-fab {
  left: 0;
  border-radius: 0 999px 999px 0;
  padding-left: 12px;
  transform: translateX(calc(-100% + 10px));
  opacity: 0.3;
  transition: transform 0.3s ease 1s, opacity 0.3s ease 1s, background 0.15s ease;
}
.fab.edit-fab:hover, .fab.edit-fab.is-editing {
  transform: translateX(0);
  opacity: 1;
  transition: transform 0.3s ease 0s, opacity 0.3s ease 0s, background 0.15s ease;
}

.para-trans[contenteditable="true"] {
  outline: 2px dashed var(--gold-dim);
  padding: 4px;
  border-radius: 4px;
  background: var(--bg-card);
}

.fab.right {
  left: auto;
  right: 20px;
}

.series-panel{
  position: fixed;
  left: 20px;
  bottom: 78px;
  z-index: 20;
  width: min(320px, calc(100vw - 40px));
  max-height: min(60vh, 480px);
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 10px 30px rgba(44,38,32,.18);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.series-panel.hidden{ display:none; }
.series-panel-header{
  font-family: var(--serif);
  font-weight: 700;
  font-size: .95rem;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
}
.series-panel-list{
  overflow-y: auto;
  padding: 6px 0;
}
.series-panel-item{
  display:flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 16px;
  cursor: pointer;
  font-size: .88rem;
  transition: background .15s ease;
}
.series-panel-item:hover{ background: var(--bg-card-hover); }
.series-panel-item.current{
  background: var(--bg-card);
  color: var(--gold);
  font-weight: 700;
}
.series-panel-order{
  font-family: var(--mono);
  font-size: .72rem;
  color: var(--ink-faint);
  flex-shrink: 0;
}

/* ---------- annotation tooltips ---------- */
.annotation {
  color: #3b82f6;
  cursor: pointer;
  position: relative;
  border-bottom: 1px dashed #3b82f6;
  padding-bottom: 1px;
}

#global-tooltip {
  position: absolute;
  background: var(--ink);
  color: #fffdf7;
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 0.88rem;
  line-height: 1.5;
  box-shadow: 0 4px 14px rgba(0,0,0,0.2);
  z-index: 100;
  max-width: 280px;
  pointer-events: none;
  opacity: 0;
  transform: translateY(6px) translateX(-50%);
  transition: opacity 0.2s ease, transform 0.2s ease;
  font-family: var(--sans);
  word-break: break-word;
}

#global-tooltip.visible {
  opacity: 1;
  transform: translateY(0) translateX(-50%);
}

@media (max-width: 600px){
  .topbar h1{ font-size: 1.15rem; }
  .grid{ grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 12px; }
  .novel-content{ padding: 22px 16px; }
}