/* ��═════════════���═════════════════════════════════���══════════
   TIANX STUDIO — About Page
   ═════���════════════════════════��════════════════════════════ */

/* ─── ABOUT HERO ──────────��────────────────────────────── */

.about-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.about-hero__image {
  width: 100%;
  aspect-ratio: 3/4;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.about-hero__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ─── TIMELINE ──���──────────────────────────────────────── */

.timeline {
  position: relative;
  padding-left: var(--space-lg);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 16px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--border-strong);
}

.timeline__item {
  position: relative;
  padding-bottom: var(--space-md);
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__dot {
  position: absolute;
  left: calc(-1 * var(--space-lg) + 10px);
  top: 4px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--surface);
  z-index: 1;
}

.timeline__date {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--signal);
  margin-bottom: var(--space-2xs);
}

.timeline__title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin-bottom: var(--space-2xs);
}

.timeline__desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ─── TECH STACK GRID ──────────────────────────────────── */

.tech-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-sm);
}

.tech-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-md) var(--space-sm);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  text-align: center;
  transition: all var(--duration-sm) var(--ease);
}

.tech-item:hover {
  border-color: var(--signal);
  background: var(--signal-pale);
}

.tech-item__icon {
  font-size: 1.8rem;
}

.tech-item__name {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.tech-item__level {
  font-size: 0.68rem;
  color: var(--text-muted);
}

/* ─── PHILOSOPHY ────��──────────────────────────────────── */

.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.philosophy-card {
  padding: var(--space-md);
  border-left: 3px solid var(--accent);
}

.philosophy-card__title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  margin-bottom: var(--space-xs);
}

.philosophy-card__desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ─── RESPONSIVE ────────────────────────────���──────────── */

@media (max-width: 1024px) {
  .about-hero { grid-template-columns: 1fr; }
  .tech-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  .tech-grid { grid-template-columns: repeat(2, 1fr); }
  .philosophy-grid { grid-template-columns: 1fr; }
}