/* ═══════════════════════════════════════════════════════════
   BLOCKS — Smart Block System & Subject Pages
   GeniusHub v21 — Redesign
   Ruhig, kein Glassmorphism, keine Gradients.
   ═══════════════════════════════════════════════════════════ */

/* ── Block Card ── */
.blk2 {
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  margin-bottom: 0;
  overflow: hidden;
  position: relative;
  display: flex;
  animation: blockIn .25s var(--ease) both;
  transition: border-color var(--dur-1) var(--ease), background var(--dur-1) var(--ease);
}
.blk2:hover {
  border-color: var(--line-2);
  background: var(--bg-1);
}
@keyframes blockIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}
.blk2-stripe { width: 3px; flex-shrink: 0; align-self: stretch; opacity: .8; }
.blk2-inner { flex: 1; padding: 14px 16px 12px; min-width: 0; }
.blk2-head { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.blk2-icon {
  width: 32px; height: 32px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: var(--bg-2);
  display: flex; align-items: center; justify-content: center;
  font-size: 15px; flex-shrink: 0;
  color: var(--fg-muted);
}
.blk2-meta { flex: 1; min-width: 0; }
.blk2-title {
  font-size: 13px; font-weight: 600;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  margin-bottom: 3px; color: var(--fg);
  letter-spacing: -.005em;
}
.blk2-badge {
  display: inline-flex; align-items: center; gap: 3px;
  font-size: 10px; font-weight: 500;
  letter-spacing: .06em; text-transform: uppercase;
  padding: 2px 7px; border-radius: var(--r-sm);
  border: 1px solid var(--line);
  color: var(--fg-dim);
}
.blk2-acts {
  display: flex; align-items: center; gap: 4px;
  flex-shrink: 0; opacity: 0;
  transition: opacity var(--dur-1) var(--ease);
}
.blk2:hover .blk2-acts { opacity: 1; }
.blk2-body { padding-top: 2px; }


/* ── Legacy Block ── */
.blk {
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  margin-bottom: 12px;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}
.blk-h {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  background: transparent;
  flex-wrap: wrap;
}
.blk-h h3 {
  font-size: 12px; font-weight: 600;
  flex: 1; min-width: 0;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  color: var(--fg);
}
.badge {
  font-size: 10px; letter-spacing: .06em;
  text-transform: uppercase; padding: 2px 6px;
  border-radius: var(--r-sm);
  font-weight: 500; flex-shrink: 0;
  border: 1px solid var(--line);
  color: var(--fg-dim);
}
.blk-b { padding: 14px; }


/* ── Mindmap ── */
.mm {
  position: relative;
  height: clamp(160px, 30vw, 240px);
  background: var(--bg-2);
  border-radius: var(--r-md);
  overflow: hidden;
}
.mm-n {
  position: absolute;
  transform: translate(-50%, -50%);
  padding: 5px 11px;
  border-radius: 99px;
  font-size: 10px;
  background: var(--bg-1);
  border: 1px solid var(--line);
  z-index: 2;
  white-space: nowrap;
  animation: fadeUp .25s var(--ease) both;
  cursor: pointer;
  color: var(--fg);
  transition: border-color var(--dur-1) var(--ease);
}
.mm-n:hover { border-color: var(--line-2); }
.mm-n.ctr {
  background: var(--accent-weak);
  border-color: var(--accent-ring);
  color: var(--accent);
  font-weight: 600;
  font-size: 11px;
  padding: 6px 13px;
}
.mm-svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.mm-add {
  position: absolute; bottom: 8px; right: 8px;
  width: 28px; height: 28px;
  border-radius: var(--r-md);
  background: var(--bg-1);
  border: 1px solid var(--line);
  color: var(--fg-muted);
  font-size: 14px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; z-index: 3;
  transition: border-color var(--dur-1) var(--ease);
}
.mm-add:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-weak); }


/* ── Ticker ── */
.tk {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 10px;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--line);
  transition: background var(--dur-1) var(--ease);
}
.tk:last-child { border-bottom: none; }
.tk:hover { background: var(--bg-2); }
.tk-d { width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0; opacity: .85; }
.tk-l {
  font-size: 12px; font-weight: 500;
  flex: 1; min-width: 0;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  color: var(--fg);
}
.tk-v {
  font-size: 12px; font-family: var(--f-mono);
  font-weight: 600; flex-shrink: 0;
  padding: 2px 7px; border-radius: var(--r-sm);
  cursor: pointer;
  color: var(--fg);
  transition: background var(--dur-1) var(--ease);
}
.tk-v:hover { background: var(--bg-3); }
.tk-add {
  display: flex; align-items: center; gap: 6px;
  padding: 6px 10px; cursor: pointer;
  color: var(--fg-dim); font-size: 11px;
  transition: color var(--dur-1) var(--ease);
}
.tk-add:hover { color: var(--accent); }


/* ── Cards ── */
.mc {
  padding: 12px 14px;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--line);
  transition: background var(--dur-1) var(--ease);
  position: relative;
}
.mc:last-of-type { border-bottom: none; }
.mc:hover { background: var(--bg-2); }
.mc h4 { font-size: 12px; font-weight: 600; margin-bottom: 4px; color: var(--fg); }
.mc p { font-size: 11px; color: var(--fg-muted); line-height: 1.55; }
.mc-del {
  position: absolute; top: 8px; right: 8px;
  opacity: 0;
  width: 22px; height: 22px;
  border-radius: var(--r-sm);
  background: var(--bg-1);
  border: 1px solid var(--line);
  color: var(--fg-muted);
  font-size: 10px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: opacity var(--dur-1) var(--ease), color var(--dur-1) var(--ease);
}
.mc:hover .mc-del { opacity: 1; }
.mc-del:hover { color: var(--err); border-color: color-mix(in oklab, var(--err) 40%, var(--line)); }


/* ── Goals ── */
.gl { margin-bottom: 12px; }
.gl-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; gap: 8px; }
.gl-n {
  font-size: 12px; font-weight: 500;
  min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  color: var(--fg);
}
.gl-p {
  font-size: 12px; font-weight: 600;
  font-family: var(--f-mono);
  flex-shrink: 0;
  display: flex; align-items: center; gap: 3px;
  color: var(--fg);
}
.gl-p-btn {
  width: 20px; height: 20px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  background: transparent;
  color: var(--fg-muted);
  font-size: 10px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: border-color var(--dur-1) var(--ease), color var(--dur-1) var(--ease);
}
.gl-p-btn:hover { border-color: var(--accent); color: var(--accent); }
.progress-f.filled { width: var(--goal-w, 0%); }


/* ── Chart ── */
.ch { display: flex; align-items: flex-end; gap: clamp(4px, 2vw, 8px); height: clamp(80px, 18vw, 130px); padding-top: 6px; }
.ch-c { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 2px; min-width: 0; }
.ch-bar {
  width: 100%;
  border-radius: 4px 4px 0 0;
  min-height: 3px; height: 3px;
  transform-origin: bottom;
  transition: height .55s cubic-bezier(.4, 0, .2, 1);
  background: var(--accent);
}
.ch-bar.filled { height: var(--bar-h, 3px); }
.ch-l {
  font-size: clamp(8px, 1.5vw, 10px);
  color: var(--fg-dim);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  max-width: 100%; margin-top: 4px;
  font-family: var(--f-mono);
}
.ch-v {
  font-size: clamp(8px, 1.5vw, 10px);
  font-weight: 600;
  font-family: var(--f-mono);
  cursor: pointer;
  color: var(--fg);
}
.ch-v:hover { color: var(--accent); }
.ch-wrap { display: flex; gap: 6px; align-items: stretch; }
.ch-yaxis { display: flex; flex-direction: column; justify-content: space-between; align-items: flex-end; padding: 6px 0; min-width: 24px; flex-shrink: 0; }
.ch-ylabel { font-size: 10px; font-family: var(--f-mono); color: var(--fg-dim); font-weight: 500; line-height: 1; }


/* ── Text ── */
.txt-c {
  font-size: 13px;
  color: var(--fg);
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
  min-height: 40px;
  outline: none;
  padding: 4px 0;
  border-radius: var(--r-md);
  transition: background var(--dur-1) var(--ease), padding var(--dur-1) var(--ease);
}
.txt-c:focus { background: var(--bg-2); padding: 8px 10px; }


/* ── Kanban ── */
.kb-wrap { display: flex; gap: 10px; overflow-x: auto; padding-bottom: 4px; }
.kb-col {
  flex: 1; min-width: 140px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 10px;
  display: flex; flex-direction: column; gap: 6px;
}
.kb-col-head {
  font-size: 10px; font-weight: 600;
  letter-spacing: .08em; text-transform: uppercase;
  color: var(--fg-dim);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  display: flex; align-items: center; justify-content: space-between;
}
.kb-cnt-num { font-weight: 400; opacity: .7; margin-left: 4px; }
.kb-item {
  padding: 8px 10px;
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  font-size: 11px;
  color: var(--fg);
  transition: border-color var(--dur-1) var(--ease);
  display: flex; align-items: center; gap: 4px;
}
.kb-item:hover { border-color: var(--line-2); }
.kb-item-text { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.kb-move {
  width: 20px; height: 20px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  background: transparent;
  color: var(--fg-muted);
  font-size: 10px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; opacity: 0;
  transition: opacity var(--dur-1) var(--ease), color var(--dur-1) var(--ease);
}
.kb-item:hover .kb-move { opacity: 1; }
.kb-move:hover { border-color: var(--accent); color: var(--accent); }
.kb-add {
  padding: 6px; text-align: center; font-size: 11px;
  color: var(--fg-dim); cursor: pointer;
  border: 1px dashed var(--line-2); border-radius: var(--r-sm);
  transition: color var(--dur-1) var(--ease), border-color var(--dur-1) var(--ease);
  margin-top: 2px;
}
.kb-add:hover { color: var(--accent); border-color: var(--accent); }


/* ── Todo ── */
.todo-list { display: flex; flex-direction: column; gap: 0; }
.todo-row {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 10px;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--line);
  transition: background var(--dur-1) var(--ease);
  cursor: pointer;
}
.todo-row:last-of-type { border-bottom: none; }
.todo-row:hover { background: var(--bg-2); }
.todo-check {
  width: 18px; height: 18px;
  border-radius: var(--r-sm);
  border: 1.5px solid var(--line-2);
  background: transparent;
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 11px; color: transparent;
  transition: all .18s var(--ease);
}
.todo-check.done {
  border-color: var(--ok);
  background: color-mix(in oklab, var(--ok) 18%, transparent);
  color: var(--ok);
}
.todo-text { font-size: 12px; color: var(--fg); flex: 1; transition: all .2s var(--ease); }
.todo-text.done { text-decoration: line-through; opacity: .45; color: var(--fg-dim); }
.todo-del {
  width: 20px; height: 20px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  background: transparent;
  color: var(--fg-muted);
  font-size: 10px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; opacity: 0;
  transition: opacity var(--dur-1) var(--ease), color var(--dur-1) var(--ease);
}
.todo-row:hover .todo-del { opacity: 1; }
.todo-del:hover { color: var(--err); border-color: color-mix(in oklab, var(--err) 40%, var(--line)); }
.todo-add {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 10px; cursor: pointer;
  color: var(--fg-dim); font-size: 11px;
  transition: color var(--dur-1) var(--ease);
}
.todo-add:hover { color: var(--accent); }


/* ── KI Panel ── */
.ki {
  background: var(--accent-weak);
  border: 1px solid var(--accent-ring);
  border-radius: var(--r-lg);
  padding: 14px;
  margin-bottom: 14px;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}
.ki h3 {
  font-size: 11px; font-weight: 600;
  color: var(--accent);
  letter-spacing: .08em; text-transform: uppercase;
  margin-bottom: 10px;
}
.ki-chips { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 10px; }
.ki-c {
  padding: 5px 11px; border-radius: 99px;
  border: 1px solid var(--line);
  background: var(--bg-1);
  font-size: 11px; color: var(--fg-muted);
  cursor: pointer;
  transition: border-color var(--dur-1) var(--ease), color var(--dur-1) var(--ease);
}
.ki-c:hover,
.ki-c.on {
  border-color: var(--accent-ring);
  color: var(--accent);
  background: var(--accent-weak);
}
.ki-row { display: flex; gap: 6px; }
.ki-inp {
  flex: 1; padding: 9px 12px;
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  color: var(--fg);
  font-size: 12px;
  outline: none; min-width: 0;
  font-family: var(--f-sans);
  transition: border-color var(--dur-1) var(--ease), box-shadow var(--dur-1) var(--ease);
}
.ki-inp:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-ring); }
.ki-inp::placeholder { color: var(--fg-dim); }
.ki-go {
  padding: 9px 14px;
  background: var(--accent);
  border: none;
  border-radius: var(--r-md);
  color: #0b0c0e;
  font-size: 11px; font-weight: 600;
  flex-shrink: 0; cursor: pointer;
  transition: filter var(--dur-1) var(--ease);
  font-family: var(--f-sans);
}
.ki-go:hover { filter: brightness(1.08); }


/* ── Block Toolbar ── */
.blk-toolbar { display: flex; gap: 8px; margin-bottom: 14px; align-items: center; }
.blk-add-btn { font-size: 12px; padding: 8px 14px; }
.blk-layout-btn {
  padding: 8px 12px; font-size: 12px;
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  color: var(--fg);
  cursor: pointer;
  transition: background var(--dur-1) var(--ease), border-color var(--dur-1) var(--ease);
  font-family: var(--f-sans); font-weight: 500;
}
.blk-layout-btn:hover { border-color: var(--line-2); background: var(--bg-2); }


/* ── Block Type Chooser ── */
.btc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 14px; }
.btc {
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  cursor: pointer;
  transition: border-color var(--dur-1) var(--ease), background var(--dur-1) var(--ease);
  display: flex; flex-direction: column;
}
.btc:hover { border-color: var(--line-2); background: var(--bg-2); transform: none; }
.btc-stripe { height: 3px; flex-shrink: 0; }
.btc-body { padding: 14px; flex: 1; display: flex; flex-direction: column; gap: 6px; }
.btc-icon { font-size: 20px; line-height: 1; color: var(--fg-muted); }
.btc-name { font-size: 12px; font-weight: 600; color: var(--fg); }
.btc-desc { font-size: 11px; color: var(--fg-muted); line-height: 1.5; }


/* ── Layout Modal ── */
.lm-list { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.lm-row {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px;
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  transition: border-color var(--dur-1) var(--ease);
}
.lm-row:hover { border-color: var(--line-2); }
.lm-icon {
  width: 28px; height: 28px;
  border-radius: var(--r-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; flex-shrink: 0;
  background: var(--bg-2);
  border: 1px solid var(--line);
  color: var(--fg-muted);
}
.lm-name { flex: 1; font-size: 12px; font-weight: 500; color: var(--fg); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lm-btns { display: flex; gap: 4px; flex-shrink: 0; }
.lm-btns button {
  width: 28px; height: 28px;
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  font-size: 11px; color: var(--fg-muted);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: border-color var(--dur-1) var(--ease), color var(--dur-1) var(--ease);
}
.lm-btns button:hover { border-color: var(--line-2); color: var(--fg); }
.lm-btns button:disabled { opacity: .3; cursor: default; }
.lm-ph { text-align: center; padding: 20px; color: var(--fg-dim); font-size: 12px; }


/* ── PDF Selection ── */
.pdf-sel-row {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px;
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  cursor: pointer;
  transition: border-color var(--dur-1) var(--ease);
}
.pdf-sel-row:hover { border-color: var(--line-2); }
.pdf-cb { width: 16px; height: 16px; flex-shrink: 0; accent-color: var(--accent); cursor: pointer; }
.pdf-sel-icon {
  width: 28px; height: 28px;
  border-radius: var(--r-sm);
  border: 1px solid;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; flex-shrink: 0;
}
.pdf-sel-name { flex: 1; font-size: 12px; font-weight: 500; color: var(--fg); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pdf-sel-type { font-size: 10px; font-weight: 500; letter-spacing: .08em; text-transform: uppercase; flex-shrink: 0; color: var(--fg-dim); }


/* ── Block Grid ── */
.blk-grid { display: grid; grid-template-columns: 1fr; gap: 12px; padding: 12px 0; }
@media (min-width: 520px) { .blk-grid { grid-template-columns: 1fr 1fr; } }
.blk-grid .blk2:nth-child(1) { animation-delay: .03s; }
.blk-grid .blk2:nth-child(2) { animation-delay: .06s; }
.blk-grid .blk2:nth-child(3) { animation-delay: .09s; }
.blk-grid .blk2:nth-child(4) { animation-delay: .12s; }
.blk-grid .blk2:nth-child(5) { animation-delay: .15s; }
.blk-grid .blk2:nth-child(6) { animation-delay: .18s; }
.blk-grid .blk2:nth-child(n+7) { animation-delay: .2s; }


/* ── Informatik ── */
.info-topic-btn {
  padding: 16px 10px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: var(--bg-1);
  cursor: pointer;
  transition: border-color var(--dur-1) var(--ease), background var(--dur-1) var(--ease);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  color: var(--fg-muted);
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  font-family: var(--f-sans);
}
.info-topic-btn:hover { border-color: var(--line-2); background: var(--bg-2); color: var(--fg); }
.info-topic-btn.on {
  border-color: var(--accent-ring);
  background: var(--accent-weak);
  color: var(--accent);
}
.info-topic-icon { font-size: 22px; color: var(--fg-muted); }
.info-topic-btn.on .info-topic-icon { color: var(--accent); }
.info-topic-title { font-size: 11px; font-weight: 600; letter-spacing: .01em; text-align: center; line-height: 1.4; }
.info-content { border-radius: var(--r-lg); overflow: hidden; }


/* ── Math ── */
.math-wrap { max-width: 600px; margin: 0 auto; position: relative; }
.math-view { position: relative; overflow: visible; min-height: 200px; }
.math-topic-btn {
  padding: 18px 10px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: var(--bg-1);
  cursor: pointer;
  transition: border-color var(--dur-1) var(--ease), background var(--dur-1) var(--ease);
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  color: var(--fg);
  text-align: center; min-height: 44px;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  font-family: var(--f-sans);
}
.math-topic-btn:hover { border-color: var(--line-2); background: var(--bg-2); }
.math-topic-icon { font-size: 28px; color: var(--fg-muted); }
.math-topic-name { font-size: 12px; font-weight: 600; letter-spacing: -.005em; line-height: 1.4; color: var(--fg); }
.math-topic-pill {
  font-size: 10px;
  letter-spacing: .08em; text-transform: uppercase;
  padding: 3px 9px; border-radius: 99px;
  border: 1px solid var(--line);
  font-weight: 500;
}
.math-topic-pill.placeholder { color: var(--fg-dim); }
.math-topic-pill.ready {
  color: var(--ok);
  border-color: color-mix(in oklab, var(--ok) 30%, var(--line));
  background: color-mix(in oklab, var(--ok) 10%, transparent);
}

.math-back-btn {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 8px 14px;
  font-size: 12px; color: var(--fg);
  cursor: pointer;
  margin-bottom: 16px;
  transition: border-color var(--dur-1) var(--ease), background var(--dur-1) var(--ease);
  min-height: 36px;
  font-family: var(--f-sans); font-weight: 500;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}
.math-back-btn:hover { border-color: var(--line-2); background: var(--bg-2); }

.math-sub-btn {
  display: flex; align-items: center; gap: 14px;
  padding: 14px 16px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: var(--bg-1);
  cursor: pointer;
  transition: border-color var(--dur-1) var(--ease), background var(--dur-1) var(--ease);
  text-align: left; width: 100%;
  min-height: 44px;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  font-family: var(--f-sans);
}
.math-sub-btn:hover { border-color: var(--line-2); background: var(--bg-2); }
.math-sub-num {
  width: 32px; height: 32px;
  border-radius: var(--r-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 600;
  flex-shrink: 0;
  background: var(--bg-2);
  border: 1px solid var(--line);
  color: var(--fg-muted);
  font-family: var(--f-mono);
}
.math-sub-info { flex: 1; min-width: 0; }
.math-sub-name { font-size: 13px; font-weight: 600; color: var(--fg); margin-bottom: 2px; }
.math-sub-meta { font-size: 11px; color: var(--fg-dim); }
.math-sub-arrow { font-size: 14px; color: var(--fg-dim); flex-shrink: 0; }

.math-detail-tabs {
  display: flex; gap: 4px; margin-bottom: 14px;
  background: var(--bg-1);
  border-radius: var(--r-md);
  padding: 4px;
  border: 1px solid var(--line);
}
.math-tab {
  flex: 1; padding: 8px 6px;
  border-radius: var(--r-sm);
  border: none; background: transparent;
  font-size: 11px; font-weight: 600;
  color: var(--fg-muted);
  cursor: pointer;
  transition: color var(--dur-1) var(--ease), background var(--dur-1) var(--ease);
  letter-spacing: .02em;
  min-height: 36px;
  font-family: var(--f-sans);
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}
.math-tab.on { background: var(--bg-2); color: var(--fg); border: 1px solid var(--line); }
.math-tab:hover:not(.on) { color: var(--fg); }

.math-detail-swipe { overflow: hidden; border-radius: var(--r-lg); }
.math-detail-track { display: flex; width: 300%; transition: transform .3s cubic-bezier(.25, .8, .25, 1); will-change: transform; }
.math-detail-panel { width: calc(100% / 3); flex-shrink: 0; padding: 4px 2px; min-height: 180px; }
.math-panel-label { font-size: 11px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 8px; color: var(--fg-muted); }

.math-card {
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 16px;
  margin-bottom: 10px;
  transition: border-color var(--dur-1) var(--ease);
}
.math-card:hover { border-color: var(--line-2); }
.math-card-head { font-size: 12px; font-weight: 600; margin-bottom: 8px; color: var(--fg); }
.math-card-body { font-size: 12px; color: var(--fg-muted); line-height: 1.7; }

.math-link { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; cursor: pointer; transition: opacity var(--dur-1) var(--ease); }
.math-link:hover { opacity: .75; }
.math-link-dead { color: var(--fg-dim); font-style: italic; }

.math-anim-out-up   { animation: mathOutUp .28s var(--ease) forwards; }
.math-anim-in-up    { animation: mathInUp .28s var(--ease) forwards; }
.math-anim-out-down { animation: mathOutDown .28s var(--ease) forwards; }
.math-anim-in-down  { animation: mathInDown .28s var(--ease) forwards; }
@keyframes mathOutUp { to { opacity: 0; transform: translateY(-8px); } }
@keyframes mathInUp { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
@keyframes mathOutDown { to { opacity: 0; transform: translateY(8px); } }
@keyframes mathInDown { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeUp { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: translateY(0); } }


/* ── White/Alternativ Overrides (minimal — Tokens steuern meistens) ── */
html.white-mode .kb-col { background: var(--bg-2); }
html.white-mode .kb-item { background: var(--bg-1); }