/* Know-more fullscreen sub-page */
.km-page[hidden] {
  display: none !important;
}

.km-page {
  position: fixed;
  inset: 0;
  z-index: 200;
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(232, 122, 111, 0.18), transparent 55%),
    radial-gradient(900px 500px at 90% 5%, rgba(155, 138, 232, 0.16), transparent 50%),
    linear-gradient(165deg, var(--paper), var(--paper-2) 45%, var(--paper-3));
  overflow: auto;
  -webkit-overflow-scrolling: touch;
}

body.km-page-active > .site-header,
body.km-page-active > main,
body.km-page-active > .site-footer,
body.km-page-active > .noise {
  visibility: hidden;
  pointer-events: none;
}

.km-shell {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  width: min(1120px, 100%);
  margin: 0 auto;
}

.km-header {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.65rem;
  padding: 1rem 1.25rem 0.95rem;
  border-bottom: 1px solid var(--line);
  background: rgba(247, 242, 235, 0.92);
  backdrop-filter: blur(10px);
}

.km-back {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  background: rgba(44, 42, 50, 0.07);
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 500;
  transition: background 0.15s;
}

.km-back:hover {
  background: rgba(155, 138, 232, 0.22);
}

.km-header-copy {
  width: 100%;
}

.km-header h3 {
  margin: 0 0 0.25rem;
  font-size: clamp(1.35rem, 2.5vw, 1.75rem);
}

.km-sub {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.km-body {
  overflow: visible;
  padding: 1.15rem 1.25rem 2.5rem;
  display: grid;
  gap: 1.1rem;
  width: 100%;
  box-sizing: border-box;
  align-content: start;
}

.km-section {
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 1rem 1.05rem 1.1rem;
  background: rgba(255, 255, 255, 0.55);
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  min-width: 0;
}

.km-section h4 {
  margin: 0 0 0.65rem;
  font-family: var(--font-display);
  font-size: 1.12rem;
}

.km-section .hint {
  margin: -0.25rem 0 0.75rem;
  color: var(--ink-soft);
  font-size: 0.88rem;
}

.km-media {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 1rem;
  align-items: center;
}

.km-media img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 14px;
}

.km-media audio {
  width: 100%;
}

.km-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.7rem;
}

.km-tab {
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: rgba(44, 42, 50, 0.06);
  color: var(--ink-soft);
  font-size: 0.85rem;
}

.km-tab.active {
  background: rgba(155, 138, 232, 0.22);
  color: var(--ink);
  font-weight: 600;
}

.km-doc {
  max-height: 320px;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--ink);
  padding: 0.65rem 0.75rem;
  border-radius: 12px;
  background: rgba(44, 42, 50, 0.03);
}

.km-score-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.7rem;
}

.km-score {
  overflow: auto;
  max-height: min(62vh, 560px);
  min-height: 280px;
  padding: 0.75rem 0.5rem 1rem;
  border-radius: 12px;
  background: #fff;
  width: 100%;
  box-sizing: border-box;
}

.km-score .osmd-container,
.km-score svg {
  max-width: 100%;
}

.km-qa-list {
  display: grid;
  gap: 0.55rem;
  max-height: 240px;
  overflow: auto;
  margin-bottom: 0.75rem;
}

.km-qa-item {
  text-align: left;
  padding: 0.7rem 0.85rem;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #fff;
  transition: border-color 0.15s, background 0.15s;
}

.km-qa-item:hover,
.km-qa-item.selected {
  border-color: rgba(155, 138, 232, 0.55);
  background: rgba(155, 138, 232, 0.08);
}

.km-qa-item strong {
  display: block;
  font-size: 0.92rem;
  margin-bottom: 0.25rem;
}

.km-qa-item span {
  display: block;
  font-size: 0.8rem;
  color: var(--ink-soft);
}

.km-options {
  margin: 0.5rem 0 0.75rem;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.35rem;
}

.km-options li {
  font-size: 0.9rem;
  padding: 0.35rem 0.55rem;
  border-radius: 8px;
  background: rgba(44, 42, 50, 0.04);
}

.km-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.km-status {
  font-size: 0.88rem;
  color: var(--ink-soft);
}

.km-status.error { color: #c0392b; }
.km-status.warn { color: #b36b00; }

.km-result {
  margin-top: 0.85rem;
  padding: 0.85rem;
  border-radius: 14px;
  background: rgba(44, 42, 50, 0.035);
  border: 1px solid var(--line);
}

.km-result .pred {
  font-weight: 600;
  margin-bottom: 0.45rem;
}

.km-think {
  white-space: pre-wrap;
  font-size: 0.9rem;
  line-height: 1.5;
  padding: 0.55rem 0.65rem;
  border-radius: 10px;
  background: #fff;
  border: 1px solid transparent;
}

.km-think.correct {
  background: rgba(124, 184, 122, 0.18);
  border-color: rgba(124, 184, 122, 0.55);
  color: #1f5b2c;
}

.km-think.wrong {
  background: rgba(232, 122, 111, 0.16);
  border-color: rgba(232, 122, 111, 0.55);
  color: #8a2a22;
}

.km-gold {
  margin-top: 0.55rem;
  font-size: 0.92rem;
}

.km-free-input,
.km-compare-select,
.km-sing-note {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.7rem 0.85rem;
  font: inherit;
  background: #fff;
  resize: vertical;
  margin-bottom: 0.6rem;
}

.km-annotatable {
  white-space: pre-wrap;
  font-size: 0.92rem;
  line-height: 1.55;
  padding: 0.7rem 0.8rem;
  border-radius: 12px;
  background: #fff;
  border: 1px solid var(--line);
  min-height: 4rem;
}

.km-annotatable mark.hl-green { background: rgba(124, 184, 122, 0.45); }
.km-annotatable mark.hl-red { background: rgba(232, 122, 111, 0.45); }
.km-annotatable mark.hl-yellow { background: rgba(240, 163, 94, 0.5); }

.km-annot-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0.55rem 0 0.2rem;
}

.km-annot-bar .btn.tiny {
  padding: 0.3rem 0.65rem;
  font-size: 0.8rem;
  border-radius: 999px;
  background: rgba(44, 42, 50, 0.07);
}

.km-annot-bar .btn.tiny.green { background: rgba(124, 184, 122, 0.28); }
.km-annot-bar .btn.tiny.red { background: rgba(232, 122, 111, 0.28); }
.km-annot-bar .btn.tiny.yellow { background: rgba(240, 163, 94, 0.35); }

.km-compare-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.5rem;
  margin-bottom: 0.6rem;
}

.km-sing-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 0.65rem;
}

.km-sing-controls .rec-dot {
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 50%;
  background: #ccc;
  display: inline-block;
}

.km-sing-controls .rec-dot.on {
  background: #e74c3c;
  box-shadow: 0 0 0 4px rgba(231, 76, 60, 0.2);
  animation: km-pulse 1.1s ease-in-out infinite;
}

@keyframes km-pulse {
  50% { transform: scale(1.15); }
}

.km-loading::after {
  content: "";
  display: inline-block;
  width: 0.85em;
  height: 0.85em;
  margin-left: 0.4em;
  border: 2px solid rgba(44, 42, 50, 0.2);
  border-top-color: var(--violet);
  border-radius: 50%;
  animation: km-spin 0.7s linear infinite;
  vertical-align: -0.1em;
}

@keyframes km-spin {
  to { transform: rotate(360deg); }
}

@media (max-width: 720px) {
  .km-media { grid-template-columns: 1fr; }
  .km-compare-row { grid-template-columns: 1fr; }
}