/* ============================================================
   GIMP 3.2 MASTERY — Session Page Stylesheet
   session.css
   ============================================================ */

/* --- Session Hero --- */
.session-hero {
  padding-block: var(--space-16) var(--space-12);
  border-bottom: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}

.session-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 80% at 70% 50%, rgba(124, 58, 237, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.session-hero__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
  flex-wrap: wrap;
}

.session-hero__number {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-faint);
  letter-spacing: 0.08em;
}

.session-hero__title {
  font-size: clamp(2rem, 5vw, var(--text-5xl));
  margin-bottom: var(--space-5);
  max-width: 16ch;
}

.session-hero__summary {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 55ch;
  margin-bottom: var(--space-8);
}

.session-hero__stats {
  display: flex;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.stat-item__value {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text);
}

.stat-item__label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* --- Session Navigation (prev/next) --- */
.session-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-6);
  border-top: 1px solid var(--color-border);
}

.session-nav__link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.session-nav__link:hover {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-violet);
}

.session-nav__label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  display: block;
  margin-bottom: 2px;
}

/* --- Phase Blocks --- */
.phase-grid {
  display: grid;
  gap: var(--space-6);
}

.phase-block {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition-base);
}

.phase-block:hover {
  border-color: var(--color-violet);
}

.phase-block__header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  cursor: pointer;
  user-select: none;
}

.phase-block__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.phase-block__icon--concept  { background: rgba(99, 102, 241, 0.15); }
.phase-block__icon--technique { background: rgba(124, 58, 237, 0.15); }
.phase-block__icon--practice  { background: rgba(16, 185, 129, 0.15); }
.phase-block__icon--stretch   { background: rgba(245, 158, 11, 0.15); }

.phase-block__meta {
  flex: 1;
}

.phase-block__time {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.phase-block__name {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text);
  margin-top: 2px;
}

.phase-block__toggle {
  font-size: 0.8rem;
  color: var(--color-text-faint);
  transition: transform var(--transition-base);
  flex-shrink: 0;
}

.phase-block__header[aria-expanded="true"] .phase-block__toggle {
  transform: rotate(180deg);
}

.phase-block__body {
  padding: var(--space-6);
  display: none;
}

.phase-block__body.open {
  display: block;
}

/* Steps within a phase */
.steps-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.step {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}

.step__num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-violet-light);
  background: var(--color-violet-dim);
  border: 1px solid rgba(124, 58, 237, 0.3);
  border-radius: var(--radius-sm);
  padding: 2px 7px;
  flex-shrink: 0;
  margin-top: 3px;
  min-width: 32px;
  text-align: center;
}

.step__content { flex: 1; }

.step__title {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.step__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 70ch;
  line-height: 1.65;
}

.step__path {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-violet-light);
  background: var(--color-violet-dim);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  display: inline-block;
  margin-top: var(--space-2);
}

/* --- Tip / Callout Box --- */
.callout {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-md);
  margin-top: var(--space-5);
}

.callout--tip {
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.callout--warn {
  background: var(--color-amber-dim);
  border: 1px solid rgba(245, 158, 11, 0.25);
}

.callout__icon { flex-shrink: 0; font-size: 1rem; margin-top: 2px; }

.callout__text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: none;
}

.callout--tip .callout__text strong { color: #34D399; }
.callout--warn .callout__text strong { color: var(--color-amber); }

/* --- Review Section --- */
.review-section {
  background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-surface-2) 100%);
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-violet);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  margin-top: var(--space-12);
}

.review-section__header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.review-section__icon {
  width: 48px;
  height: 48px;
  background: var(--color-violet-dim);
  border: 1px solid rgba(124, 58, 237, 0.3);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}

.review-section__title {
  font-size: var(--text-xl);
  font-weight: 700;
}

.review-section__time {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-violet-light);
}

.review-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

.review-block__title {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-faint);
  margin-bottom: var(--space-3);
}

.review-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.review-list li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding-left: var(--space-4);
  position: relative;
}

.review-list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--color-text-faint);
}

/* Progress indicator on session pages */
.session-progress {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
}

.session-progress__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-border);
  flex-shrink: 0;
  transition: background var(--transition-base);
}

.session-progress__dot.done { background: var(--color-violet); }
.session-progress__dot.current {
  background: var(--color-amber);
  box-shadow: 0 0 6px var(--color-amber);
}

/* --- Responsive Session --- */
@media (max-width: 768px) {
  .review-grid {
    grid-template-columns: 1fr;
  }
  .session-hero__stats {
    gap: var(--space-4);
  }
  .phase-block__body {
    padding: var(--space-4);
  }
}