/* ==========================================================================
   INTERACTIVE TOOLS STYLESHEET — PROSTAKTIV LAB
   Calculators, Quizzes, Sliders, Dials & Score Meters
   ========================================================================== */

.tools-nav-tabs {
  display: flex;
  gap: 0.5rem;
  border-bottom: var(--border-hairline);
  margin-bottom: 2.5rem;
  overflow-x: auto;
  padding-bottom: 2px;
}

.tool-tab-btn {
  padding: 0.75rem 1.25rem;
  background: var(--bg-surface);
  border: var(--border-hairline);
  border-bottom: none;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.tool-tab-btn:hover {
  color: var(--text-primary);
  background: var(--bg-subtle);
}

.tool-tab-btn.active {
  background: var(--accent-pine);
  color: #FFFFFF;
  border-color: var(--accent-pine);
}

.tool-card-box {
  background: var(--bg-surface);
  border: var(--border-hairline);
  border-radius: var(--radius-sm);
  padding: clamp(1.5rem, 4vw, 2.5rem);
  box-shadow: var(--shadow-subtle);
  margin-bottom: 3rem;
}

.tool-badge-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.tool-inputs-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin: 1.75rem 0;
}

@media (min-width: 640px) {
  .tool-inputs-grid.two-cols {
    grid-template-columns: repeat(2, 1fr);
  }
  .tool-inputs-grid.three-cols {
    grid-template-columns: repeat(3, 1fr);
  }
}

.tool-results-panel {
  background: var(--bg-subtle);
  border: var(--border-hairline);
  border-radius: var(--radius-sm);
  padding: 1.75rem;
  margin-top: 2rem;
}

.sleep-cycles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.sleep-cycle-card {
  background: var(--bg-surface);
  border: var(--border-hairline);
  border-radius: var(--radius-sm);
  padding: 1rem;
  text-align: center;
  transition: all var(--transition-fast);
}

.sleep-cycle-card.optimal {
  border-color: var(--accent-pine);
  background: rgba(31, 46, 39, 0.04);
}

.sleep-cycle-card.suggested {
  border-color: var(--accent-amber);
  background: rgba(167, 93, 56, 0.04);
}

.sleep-cycle-time {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--accent-pine);
  margin: 0.25rem 0;
}

.sleep-cycle-cycles {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-family: var(--font-mono);
}

/* Quiz Stepper & Questions */
.quiz-step {
  display: none;
}
.quiz-step.active {
  display: block;
  animation: fadeIn 0.25s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.quiz-progress-track {
  width: 100%;
  height: 6px;
  background: var(--bg-subtle);
  border-radius: 3px;
  margin-bottom: 2rem;
  overflow: hidden;
}

.quiz-progress-fill {
  height: 100%;
  background: var(--accent-amber);
  width: 14%;
  transition: width 0.3s ease;
}

.quiz-options-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin: 1.5rem 0;
}

.quiz-option-btn {
  display: flex;
  align-items: center;
  padding: 1rem 1.25rem;
  background: var(--bg-surface);
  border: var(--border-hairline);
  border-radius: var(--radius-sm);
  text-align: left;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.quiz-option-btn:hover {
  border-color: var(--accent-pine);
  background: rgba(31, 46, 39, 0.02);
}

.quiz-option-btn.selected {
  border-color: var(--accent-pine);
  background: rgba(31, 46, 39, 0.06);
  font-weight: 600;
}

.quiz-score-display {
  text-align: center;
  padding: 2rem 1rem;
}

.quiz-score-number {
  font-family: var(--font-serif);
  font-size: 4rem;
  font-weight: 700;
  color: var(--accent-pine);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.quiz-score-label {
  font-family: var(--font-mono);
  text-transform: uppercase;
  font-size: 0.875rem;
  color: var(--accent-amber);
  font-weight: 600;
  letter-spacing: 0.06em;
}

/* Hydration Output Meters */
.metric-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.metric-box {
  background: var(--bg-surface);
  border: var(--border-hairline);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
}

.metric-val {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 600;
  color: var(--accent-pine);
  line-height: 1.1;
}

.metric-unit {
  font-size: 0.95rem;
  font-family: var(--font-sans);
  color: var(--text-muted);
}

.metric-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-light);
  text-transform: uppercase;
  margin-top: 0.35rem;
}