/* Shared styles for interactive tool pages */

.tool-shell {
  max-width: 900px;
  margin: 0 auto 4rem;
  padding: 0 2rem;
}

.tool-back {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--muted);
  text-decoration: none;
  margin-bottom: 1rem;
}

.tool-back:hover { color: var(--accent); }

.tool-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.tool-panel h2 {
  font-family: 'Merriweather', serif;
  font-size: 1.15rem;
  margin-bottom: 1rem;
}

.field-row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 0.75rem;
}

.field-row > * { flex: 1; min-width: 160px; }

label {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 0.3rem;
}

input[type="text"],
input[type="date"],
input[type="number"],
textarea,
select {
  width: 100%;
  font-family: inherit;
  font-size: 0.9rem;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
}

textarea { resize: vertical; min-height: 80px; }

input:focus, textarea:focus, select:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 0.6rem 1.1rem;
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  opacity: 1;
}

.btn:hover { opacity: 0.92; color: #fff; }

.btn.secondary {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}

.btn.secondary:hover { color: var(--accent); }

.btn.danger {
  background: transparent;
  color: #b3261e;
  border: 1px solid #e0b4b0;
}

.btn.danger:hover { color: #b3261e; }

.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-row { display: flex; gap: 0.6rem; flex-wrap: wrap; margin-top: 0.5rem; }

.item-list { display: flex; flex-direction: column; gap: 0.6rem; }

.item-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
}

.item-row .grow { flex: 1; }

.item-row .meta { font-size: 0.75rem; color: var(--muted); }

.icon-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--muted);
  font-size: 1rem;
  padding: 0.2rem 0.4rem;
  line-height: 1;
}

.icon-btn:hover { color: #b3261e; }

.empty-state {
  text-align: center;
  color: var(--muted);
  font-size: 0.88rem;
  padding: 2rem 1rem;
}

.pill {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  background: var(--tag-bg);
  color: var(--tag-text);
}

.pill.mastered { background: var(--accent-light); color: #1b4332; }
.pill.overdue { background: #fde8e8; color: #b3261e; }

.helper-text {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 0.5rem;
}

/* Flip card */
.flip-card {
  perspective: 1000px;
  height: 260px;
  cursor: pointer;
}

.flip-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.5s;
  transform-style: preserve-3d;
}

.flip-card.flipped .flip-card-inner { transform: rotateY(180deg); }

.flip-card-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
  font-size: 1.2rem;
}

.flip-card-face.back { transform: rotateY(180deg); background: var(--accent-light); }

/* Timer */
.timer-display {
  font-family: 'Merriweather', serif;
  font-size: 4.5rem;
  text-align: center;
  margin: 1.5rem 0;
  color: var(--text);
}

.timer-mode-label {
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent);
}

/* Concept map canvas */
.map-canvas {
  position: relative;
  width: 100%;
  height: 480px;
  background: var(--bg);
  border: 1px dashed var(--border);
  border-radius: 10px;
  overflow: hidden;
}

.map-node {
  position: absolute;
  background: var(--surface);
  border: 2px solid var(--accent);
  border-radius: 8px;
  padding: 0.5rem 0.8rem;
  font-size: 0.85rem;
  cursor: grab;
  user-select: none;
  max-width: 160px;
}

.map-node.selected { background: var(--accent-light); }

@media print {
  header, footer, .tool-back, .no-print { display: none !important; }
}