/* ==========================================================================
   Home (index.html)
   ========================================================================== */

/* ---- Hero ---- */
.hero {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: var(--space-7);
  padding-block: var(--space-8) var(--space-8);
}
.hero h1 {
  font-size: var(--fs-hero);
  line-height: 1.2;
  margin: var(--space-4) 0 var(--space-5);
}
.hero h1 em {
  font-style: normal;
  color: var(--iris-300);
}
.hero-lede {
  font-size: var(--fs-lg);
  color: var(--text-muted);
  max-width: 46ch;
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-5);
}
.hero-diagram { display: flex; justify-content: center; }
.hero-diagram svg { width: 100%; height: auto; max-width: 400px; }

/* ---- Ticker ---- */
.ticker-section {
  border-block: 1px solid var(--border-subtle);
  background: rgba(18, 16, 21, 0.55);
  padding-block: var(--space-4);
  overflow: hidden;
}
.ticker-mask {
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.ticker-track {
  display: flex;
  width: max-content;
  gap: var(--space-3);
  animation: ticker-scroll 48s linear infinite;
}
/* หยุดเมื่อ hover/โฟกัส เพื่อให้อ่านคำได้ (เดิมเปลี่ยนความเร็ว ทำให้ตำแหน่งกระโดด) */
.ticker-section:hover .ticker-track,
.ticker-section:focus-within .ticker-track {
  animation-play-state: paused;
}
@keyframes ticker-scroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}
.ticker-item {
  flex: 0 0 auto;
  white-space: nowrap;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  background: var(--graphite-850);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--text-muted);
}
.ticker-item b {
  font-weight: 500;
  color: var(--iris-300);
}

/* ---- Subjects ---- */
.subjects { padding-block: var(--space-8) var(--space-5); }
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-5);
}
.section-head h2 { font-size: var(--fs-xl); }
.section-head p { margin: 0; color: var(--text-faint); font-size: var(--fs-sm); }

.subject-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
  gap: var(--space-4);
}

.subject-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-5);
  color: var(--text);
  text-decoration: none;
  background: var(--graphite-850);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: transform var(--dur) var(--ease-out), border-color var(--dur) var(--ease-out),
    box-shadow var(--dur) var(--ease-out), background-color var(--dur) var(--ease-out);
}
.subject-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}
.subject-card h3 { font-size: var(--fs-xl); }
.card-sub {
  margin: 0;
  font-size: var(--fs-sm);
  color: var(--iris-300);
}
.card-desc {
  margin: var(--space-2) 0 0;
  font-size: var(--fs-sm);
  color: var(--text-muted);
}
.card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-top: auto;
  padding-top: var(--space-4);
  border-top: 1px dashed var(--border);
  font-size: var(--fs-sm);
  color: var(--text-faint);
}
.card-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--iris-300);
  font-weight: 600;
}
.card-cta .arrow { transition: transform var(--dur) var(--ease-out); }

a.subject-card:hover {
  color: var(--text);
  transform: translateY(-3px);
  border-color: var(--iris-600);
  background: linear-gradient(180deg, rgba(142, 113, 211, 0.07), transparent 60%), var(--graphite-850);
  box-shadow: var(--shadow-lift);
}
a.subject-card:hover .card-cta .arrow { transform: translateX(4px); }
a.subject-card:active { transform: translateY(-1px); }
a.subject-card:focus-visible { outline-offset: 4px; border-radius: var(--radius-lg); }

.subject-card--pending .card-foot { border-top-style: dotted; }

.add-slot {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 180px;
  padding: var(--space-5);
  text-align: center;
  border: 1.5px dashed var(--border-strong);
  border-radius: var(--radius-lg);
  color: var(--text-faint);
  font-size: var(--fs-sm);
}
.add-slot .plus {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  font-family: var(--font-display);
  font-size: 1.3rem;
  line-height: 1;
  color: var(--text-muted);
}
.add-slot strong { color: var(--text-muted); font-weight: 500; }

/* ---- Responsive ---- */
@media (max-width: 760px) {
  .hero {
    grid-template-columns: 1fr;
    gap: var(--space-5);
    padding-block: var(--space-6) var(--space-7);
  }
  .hero-diagram { order: -1; max-width: 280px; margin-inline: auto; }
  .hero-lede { font-size: var(--fs-md); }
}

@media (prefers-reduced-motion: reduce) {
  .ticker-track { animation: none; }
  .ticker-item[aria-hidden="true"] { display: none; }
  .ticker-mask {
    overflow-x: auto;
    -webkit-mask-image: none;
    mask-image: none;
  }
}