/* ═══════════ Buttons ═══════════ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 10px 22px;
  border-radius: var(--radius-md);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: var(--text-base);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  transition: transform var(--transition-fast), filter var(--transition-fast);
  border: 1px solid transparent;
}

.btn:hover { transform: translateY(-1px); filter: brightness(1.08); }
.btn:active { transform: translateY(0); }
.btn:disabled {
  cursor: not-allowed;
  opacity: 0.52;
  filter: grayscale(0.35);
  transform: none;
}

.btn--primary {
  background:
    linear-gradient(180deg, rgba(255,255,255,0.18), rgba(0,0,0,0.18)),
    var(--accent, var(--crimson));
  color: #f8efd4;
  padding: 14px 32px;
  font-size: var(--text-lg);
  border: 1px solid rgba(0,0,0,0.35);
  box-shadow:
    inset 0 1px 0 rgba(255,230,170,0.35),
    inset 0 -2px 0 rgba(0,0,0,0.3),
    0 4px 0 rgba(0,0,0,0.25),
    0 8px 18px rgba(0,0,0,0.35);
  text-shadow: 0 1px 0 rgba(0,0,0,0.5);
}

.btn--secondary {
  background: linear-gradient(180deg, #f1dca8, #d9bd7a);
  color: var(--ink);
  border: 1px solid var(--gold-deep);
  box-shadow: inset 0 1px 0 rgba(255,248,220,0.7), 0 2px 0 rgba(0,0,0,0.15);
}

.btn--back {
  background: none;
  color: var(--ink-muted);
  font-size: var(--text-sm);
  padding: 6px 10px;
  letter-spacing: 0.08em;
  border: 1px solid transparent;
}
.btn--back:hover { color: var(--gold-deep); border-color: rgba(138,106,32,0.3); }

/* ═══════════ Topic Cards ═══════════ */

.topic-card {
  position: relative;
  background:
    linear-gradient(180deg, rgba(255,245,210,0.7), rgba(227,199,145,0.7)),
    var(--bg-card);
  border: 1px solid var(--bg-card-edge);
  border-radius: var(--radius-md);
  padding: var(--space-lg) var(--space-lg) var(--space-md);
  box-shadow:
    inset 0 0 24px rgba(138,106,32,0.12),
    var(--shadow-md);
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  overflow: hidden;
}

/* gilded banner strip along the top holding the sigil */
.topic-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--gold-deep), var(--accent), var(--gold-deep));
}

.topic-card::after {
  content: '';
  position: absolute;
  inset: 3px;
  border: 1px solid rgba(138,106,32,0.35);
  border-radius: 2px;
  pointer-events: none;
}

.topic-card:hover {
  transform: translateY(-3px);
  box-shadow: inset 0 0 24px rgba(138,106,32,0.15), var(--shadow-lg);
}

.topic-card__icon {
  width: 56px; height: 56px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin-bottom: var(--space-sm);
  background: radial-gradient(circle at 35% 30%, var(--gold-bright), var(--accent) 70%, var(--accent-dark, var(--accent)));
  color: #fff6d8;
  border-radius: 50%;
  border: 2px solid var(--gold);
  box-shadow: inset 0 2px 4px rgba(255,255,255,0.4), inset 0 -3px 6px rgba(0,0,0,0.3), 0 2px 6px rgba(0,0,0,0.25);
  text-shadow: 0 1px 2px rgba(0,0,0,0.4);
}

.topic-card__title {
  font-family: var(--font-heading);
  font-weight: 600;
  letter-spacing: 0.08em;
  font-size: var(--text-lg);
  color: var(--ink);
  text-transform: uppercase;
  margin-bottom: 2px;
}

.topic-card__desc {
  font-family: var(--font-body);
  font-style: italic;
  font-size: var(--text-sm);
  color: var(--ink-muted);
  margin-bottom: var(--space-md);
  line-height: 1.45;
}

/* ═══════════ Progress Bars (treated as rune bars) ═══════════ */

.progress-bar {
  height: 10px;
  background: rgba(138,106,32,0.2);
  border: 1px solid var(--gold-deep);
  border-radius: 2px;
  overflow: hidden;
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.35);
}

.progress-bar__fill {
  height: 100%;
  background:
    linear-gradient(180deg, var(--gold-bright), var(--accent) 60%, var(--accent-dark, var(--gold-deep)));
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.3);
  transition: width var(--transition-slow);
}

.progress-label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--ink-muted);
  margin-top: 6px;
  letter-spacing: 0.04em;
}

/* ═══════════ Level items (entries in a tome) ═══════════ */

.level-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background:
    linear-gradient(180deg, rgba(255,245,210,0.5), rgba(227,199,145,0.5));
  border: 1px solid var(--bg-card-edge);
  border-left: 4px solid var(--accent, var(--gold));
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}
.level-item:hover:not(.level-item--locked) {
  transform: translateX(2px);
  background: linear-gradient(180deg, #fbecc8, #ecd49d);
  box-shadow: var(--shadow-sm);
}
.level-item--locked { opacity: 0.45; cursor: not-allowed; filter: grayscale(0.4); }
.level-item--completed { border-left-color: var(--correct); }

.level-item__number {
  width: 48px; height: 48px;
  display: inline-flex;
  align-items: center; justify-content: center;
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--gold-deep);
  background: radial-gradient(circle at 30% 30%, #fff1c4, #d9b974 70%, #8a6a20);
  border: 2px solid var(--gold-deep);
  border-radius: 50%;
  box-shadow: inset 0 2px 4px rgba(255,255,255,0.5), 0 2px 4px rgba(0,0,0,0.25);
  flex-shrink: 0;
}

.level-item__info { flex: 1; }

.level-item__title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: var(--text-lg);
  letter-spacing: 0.04em;
  color: var(--ink);
}

.level-item__subtitle {
  font-family: var(--font-body);
  font-style: italic;
  font-size: var(--text-sm);
  color: var(--ink-muted);
}

.level-item__lesson-status {
  display: inline-flex;
  margin-top: 6px;
  padding: 3px 8px;
  border: 1px solid rgba(138,106,32,0.32);
  border-radius: 3px;
  background: rgba(255,248,220,0.62);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-dark, var(--gold-deep));
}

.level-item__stars { display: flex; gap: 2px; }

.level-item__lock {
  font-size: var(--text-xl);
  color: var(--ink-muted);
}

/* ═══════════ Stars ═══════════ */
.star {
  color: var(--star-empty);
  font-size: var(--text-xl);
  text-shadow: 0 1px 0 rgba(0,0,0,0.1);
}
.star--filled {
  color: var(--star-gold);
  text-shadow: 0 0 8px rgba(244, 204, 93, 0.6);
}
.stars-large .star { font-size: var(--text-4xl); }

/* ═══════════ Problem card (scroll-within-a-scroll) ═══════════ */

.problem-card {
  background:
    linear-gradient(180deg, #faecc7, #e8cf9a);
  border: 1px solid var(--bg-card-edge);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  box-shadow:
    inset 0 0 40px rgba(138,106,32,0.18),
    var(--shadow-md);
  text-align: center;
  position: relative;
}

.problem-card::before {
  content: '';
  position: absolute;
  inset: 4px;
  border: 1px solid rgba(138,106,32,0.4);
  border-radius: 2px;
  pointer-events: none;
}

.problem-card__question {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: var(--space-lg);
  line-height: 1.35;
  color: var(--ink);
}

.problem-card__math {
  font-family: var(--font-mono);
  font-size: var(--text-3xl);
  font-weight: 600;
  margin-bottom: var(--space-lg);
  letter-spacing: 0;
  color: var(--ink);
}

/* Problem dots as rune pips */
.problem-dot {
  width: 12px; height: 12px;
  border-radius: 50%;
  background: rgba(138,106,32,0.25);
  border: 1px solid var(--gold-deep);
}
.problem-dot--correct { background: var(--correct); border-color: var(--correct); }
.problem-dot--incorrect { background: var(--incorrect); border-color: var(--incorrect); }
.problem-dot--current {
  background: var(--gold-bright);
  box-shadow: 0 0 0 3px rgba(244,204,93,0.3), 0 0 10px var(--gold-bright);
}

/* ═══════════ Inputs ═══════════ */

.answer-input,
.expression-input,
.sequence-blank {
  background: rgba(255,248,220,0.85);
  border: 2px solid var(--gold-deep);
  color: var(--ink);
  font-family: var(--font-mono);
  font-weight: 600;
  outline: none;
  transition: all var(--transition-fast);
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.12);
  border-radius: var(--radius-sm);
}
.answer-input {
  width: 120px;
  padding: 12px;
  font-size: var(--text-2xl);
  text-align: center;
}
.expression-input {
  width: 280px;
  padding: 12px;
  font-size: var(--text-xl);
  text-align: center;
}
.sequence-blank {
  width: 80px;
  padding: 8px;
  font-size: var(--text-2xl);
  text-align: center;
  border-style: dashed;
  background: rgba(255,240,200,0.6);
}
.answer-input:focus,
.expression-input:focus,
.sequence-blank:focus {
  border-color: var(--accent, var(--crimson));
  box-shadow: 0 0 0 3px rgba(201,162,74,0.3), inset 0 2px 4px rgba(0,0,0,0.12);
  background: #fff8dc;
}
.answer-input--correct, .sequence-blank--correct {
  border-color: var(--correct);
  background: var(--correct-light);
}
.answer-input--incorrect, .sequence-blank--incorrect {
  border-color: var(--incorrect);
  background: var(--incorrect-light);
}

.expression-help {
  font-family: var(--font-body);
  font-style: italic;
  font-size: var(--text-sm);
  color: var(--ink-muted);
  margin-top: var(--space-sm);
}

/* ═══════════ Multiple Choice ═══════════ */

.choices {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.choice-btn {
  background: linear-gradient(180deg, #f8e8bf, #dfc17f);
  border: 1.5px solid var(--gold-deep);
  border-radius: var(--radius-sm);
  padding: 14px 20px;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink);
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.5), 0 2px 0 rgba(0,0,0,0.15);
}

.choice-btn:hover {
  background: linear-gradient(180deg, #fff1c4, #e9c98b);
  transform: translateY(-1px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.6), 0 3px 0 rgba(0,0,0,0.2);
}

.choice-btn--correct {
  background: linear-gradient(180deg, #d9eac1, #a9c589);
  border-color: var(--correct);
  color: var(--correct);
}
.choice-btn--incorrect {
  background: linear-gradient(180deg, #f1c6b9, #c89784);
  border-color: var(--incorrect);
  color: var(--incorrect);
}
.choice-btn--disabled { pointer-events: none; opacity: 0.7; }
.choice-btn--disabled.choice-btn--correct { opacity: 1; }

/* ═══════════ Sequence ═══════════ */

.sequence-row {
  display: flex; align-items: center; justify-content: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-bottom: var(--space-lg);
}
.sequence-item {
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  font-weight: 600;
  padding: var(--space-sm) var(--space-md);
  color: var(--ink);
}
.sequence-sep { font-size: var(--text-xl); color: var(--gold-deep); }

/* ═══════════ Hint ═══════════ */

.hint-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-body);
  font-style: italic;
  font-size: var(--text-sm);
  color: var(--ink-muted);
  cursor: pointer;
  margin-top: var(--space-md);
  padding: 4px 10px;
  border: 1px dashed rgba(138,106,32,0.4);
  border-radius: var(--radius-sm);
  background: rgba(255,240,200,0.4);
}
.hint-toggle:hover { color: var(--gold-deep); background: rgba(255,240,200,0.7); }

.hint-text {
  font-family: var(--font-body);
  font-style: italic;
  font-size: var(--text-sm);
  color: var(--ink-soft);
  background: rgba(255,240,200,0.6);
  border-left: 3px solid var(--gold);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  margin-top: var(--space-sm);
  animation: fadeIn var(--transition-fast);
}

/* ═══════════ Feedback ═══════════ */

.feedback {
  margin-top: var(--space-md);
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-weight: 700;
  letter-spacing: 0;
  animation: fadeIn var(--transition-fast);
  border: 1px solid;
  text-align: left;
}
.feedback--correct {
  background: var(--correct-light);
  color: var(--coordinates-dark);
  border-color: var(--correct);
}
.feedback--incorrect {
  background: var(--incorrect-light);
  color: var(--geometry-dark);
  border-color: var(--incorrect);
}
.feedback__title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink);
}
.feedback__answer,
.feedback__streak {
  margin-top: 4px;
}
.feedback__why {
  margin-top: var(--space-sm);
  padding-top: var(--space-sm);
  border-top: 1px solid rgba(42,29,16,0.16);
}
.feedback__why span {
  display: block;
  margin-bottom: 2px;
  font-size: var(--text-xs);
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-dark, var(--gold-deep));
}
.feedback__why p {
  margin: 0;
}
.feedback__review {
  margin-top: var(--space-sm);
  padding: 7px 10px;
  border: 1px solid rgba(138,106,32,0.38);
  border-radius: var(--radius-sm);
  background: rgba(255,248,220,0.6);
  color: var(--ink);
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
}

.problem-visual {
  margin: 0 auto var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
  padding: var(--space-md);
  border: 1px solid rgba(138,106,32,0.28);
  border-radius: var(--radius-sm);
  background: rgba(255,248,220,0.46);
}
.problem-mini-fraction {
  display: grid;
  gap: 5px;
  justify-items: center;
  min-width: 82px;
}
.problem-mini-fraction__bar {
  width: 72px;
  height: 22px;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  border: 1px solid var(--gold-deep);
}
.problem-mini-fraction__bar span {
  border-right: 1px solid rgba(138,106,32,0.4);
  background: rgba(255,248,220,0.72);
}
.problem-mini-fraction__bar span:last-child { border-right: 0; }
.problem-mini-fraction__bar span.is-filled {
  background: linear-gradient(180deg, var(--accent-light), var(--accent));
}
.problem-mini-fraction strong,
.problem-visual--coordinates strong {
  font-family: var(--font-heading);
  color: var(--ink);
}
.problem-coordinate-grid {
  display: grid;
  grid-template-columns: repeat(13, 10px);
  grid-template-rows: repeat(13, 10px);
  border-left: 1px solid var(--gold-deep);
  border-bottom: 1px solid var(--gold-deep);
  background: rgba(255,248,220,0.46);
}
.problem-coordinate-cell {
  position: relative;
  border-top: 1px solid rgba(138,106,32,0.16);
  border-right: 1px solid rgba(138,106,32,0.16);
}
.problem-coordinate-cell--axis {
  background: rgba(138,106,32,0.12);
}
.problem-coordinate-cell--point::after {
  content: '';
  position: absolute;
  inset: 2px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px rgba(42,95,143,0.55);
}

.submit-area {
  margin-top: var(--space-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}

/* ═══════════ Mascot (companion / familiar card) ═══════════ */

.mascot-container {
  display: flex; align-items: center;
  gap: var(--space-lg);
  background:
    linear-gradient(180deg, rgba(255,245,210,0.6), rgba(227,199,145,0.6));
  border: 1px solid var(--bg-card-edge);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
  box-shadow: inset 0 0 30px rgba(138,106,32,0.15);
}
.mascot-area { flex-shrink: 0; }
.mascot-info { flex: 1; min-width: 0; }
.mascot-rank {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 400;
  color: var(--gold-deep);
  line-height: 1;
}
.mascot-stage {
  font-family: var(--font-body);
  font-style: italic;
  font-size: var(--text-sm);
  color: var(--ink-muted);
  margin-bottom: var(--space-sm);
}
.mascot-next { font-size: var(--text-sm); color: var(--ink-muted); }
.mascot-next--max { color: var(--gold-deep); font-weight: 700; }
.mascot-stars-total {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--gold-deep);
  margin-top: var(--space-xs);
  letter-spacing: 0.06em;
}

/* ═══════════ Daily Challenge Card ═══════════ */

.daily-card {
  display: flex; align-items: center;
  gap: var(--space-md);
  background:
    linear-gradient(135deg, #1f4569 0%, #16324d 100%);
  color: #fae7b3;
  border: 1px solid var(--gold);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  margin-bottom: var(--space-lg);
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow:
    inset 0 1px 0 rgba(255,230,170,0.2),
    inset 0 0 30px rgba(0,0,0,0.35),
    0 4px 14px rgba(0,0,0,0.35);
  position: relative;
  overflow: hidden;
}
.daily-card::before {
  content: '';
  position: absolute;
  inset: 4px;
  border: 1px solid rgba(201,162,74,0.3);
  border-radius: 2px;
  pointer-events: none;
}
.daily-card:hover { transform: translateY(-2px); filter: brightness(1.1); }

.daily-card__icon {
  font-size: var(--text-3xl);
  filter: drop-shadow(0 0 8px rgba(244,204,93,0.5));
}
.daily-card__info { flex: 1; }
.daily-card__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  color: var(--gold-bright);
  letter-spacing: 0.02em;
}
.daily-card__desc {
  font-family: var(--font-body);
  font-style: italic;
  font-size: var(--text-sm);
  color: rgba(250,231,179,0.75);
}
.daily-card__arrow {
  font-size: var(--text-2xl);
  color: var(--gold);
  font-weight: 700;
}

/* ═══════════ Mastery Badge ═══════════ */

.mastery-badge {
  position: absolute;
  top: -10px; right: -8px;
  width: 40px; height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  background: radial-gradient(circle at 35% 30%, #fff0b8, var(--gold) 60%, var(--gold-deep));
  color: var(--crimson-bright);
  border-radius: 50%;
  border: 2px solid var(--gold-deep);
  box-shadow: 0 3px 8px rgba(0,0,0,0.4), inset 0 1px 0 rgba(255,255,255,0.4);
  animation: popIn 0.3s ease;
  z-index: 2;
  text-shadow: 0 1px 2px rgba(0,0,0,0.4);
}

.topic-card--mastered::before {
  background: linear-gradient(90deg, var(--gold-bright), var(--gold), var(--gold-bright));
  height: 8px;
}

/* ═══════════ Streak Banner ═══════════ */

.streak-banner {
  text-align: center;
  padding: 10px 16px;
  margin-bottom: var(--space-md);
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, #5a1a1a, #8b1a1a);
  border: 1px solid var(--gold);
  box-shadow: inset 0 1px 0 rgba(255,230,170,0.2), 0 2px 10px rgba(0,0,0,0.3);
}
.streak-text {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
  color: var(--gold-bright);
  letter-spacing: 0.04em;
  text-shadow: 0 1px 0 rgba(0,0,0,0.5);
}

/* ═══════════ Results Streak ═══════════ */

.results-streak {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--gold-bright);
  background: linear-gradient(135deg, #3a1d1d, #6a1a1a);
  border: 1px solid var(--gold);
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  display: inline-block;
  margin-bottom: var(--space-lg);
  box-shadow: inset 0 0 20px rgba(0,0,0,0.35);
}

/* ═══════════ Micro-anim ═══════════ */

.problem-card--correct-flash { animation: correctFlash 0.6s ease; }

.micro-anim { position: relative; height: 0; overflow: visible; }
.sparkle {
  position: absolute;
  width: 10px; height: 10px;
  background: var(--star-gold);
  border-radius: 50%;
  animation: sparkleOut 0.7s ease forwards;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 8px var(--star-gold);
}
.sparkle:nth-child(2n) { background: var(--crimson-bright); box-shadow: 0 0 8px var(--crimson-bright); }
.sparkle:nth-child(3n) { background: var(--gold-bright); box-shadow: 0 0 10px var(--gold-bright); width: 6px; height: 6px; }