/* ============================================
   COMPONENT — Hero & Book Grid
   ============================================ */

/* ── Hero ── */
.hero {
  padding-block: var(--space-16) var(--space-10);
  text-align: center;
  background: linear-gradient(180deg, var(--color-yellow-light) 0%, var(--color-white) 100%);
  overflow: hidden;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 20% 50%, rgba(245,197,24,0.08) 0%, transparent 60%),
                    radial-gradient(circle at 80% 20%, rgba(232,116,74,0.06) 0%, transparent 50%);
  pointer-events: none;
}

.hero__logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  animation: heroEntrance 1s var(--ease-out) both;
}

.hero__logo-icon {
  width: 160px;
  height: 160px;
  filter: drop-shadow(0 12px 24px rgba(245,197,24,0.3));
}

.hero__logo-title {
  font-family: var(--font-display);
  font-weight: var(--weight-black);
  font-size: var(--text-hero);
  color: var(--color-yellow-dark);
  line-height: 1;
  margin-top: var(--space-2);
  letter-spacing: -0.02em;
}

.hero__logo-sub {
  font-family: var(--font-display);
  font-weight: var(--weight-black);
  font-size: var(--text-3xl);
  color: var(--color-ink);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-top: calc(-1 * var(--space-2));
}

/* ── Book Grid ── */
.book-grid {
  padding-inline: var(--container-pad);
  padding-block: var(--space-6) var(--space-16);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  max-width: var(--container-max);
  margin-inline: auto;
}

.book-card {
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 3 / 4;
  cursor: pointer;
  position: relative;
  transition: transform var(--duration-slow) var(--ease-spring),
              box-shadow var(--duration-slow) var(--ease-out);
  box-shadow: var(--shadow-sm);
}

.book-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.18) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease-out);
}

.book-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-lg);
}

.book-card:hover::after {
  opacity: 1;
}

.book-card__inner {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  text-align: center;
}

/* Individual card color themes */
.book-card--ship    { background: linear-gradient(145deg, #bdd4e7, #8693ab); }
.book-card--science { background: linear-gradient(145deg, #ffecd2, #fcb69f); }
.book-card--tree    { background: linear-gradient(145deg, #d4fc79, #96e6a1); }
.book-card--brilliance { background: linear-gradient(145deg, #2980B9, #6DD5FA); }
.book-card--building   { background: linear-gradient(145deg, #dfe6e9, #b2bec3); }
.book-card--sketch     { background: linear-gradient(145deg, #f5f5f5, #dfe6e9); }
.book-card--world      { background: linear-gradient(145deg, #ffeaa7, #f9ca24); }
.book-card--charles    { background: linear-gradient(145deg, #00b894, #00cec9); }

.book-card__label {
  font-family: var(--font-display);
  font-weight: var(--weight-black);
  font-size: var(--text-md);
  color: var(--color-white);
  line-height: var(--leading-snug);
  text-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.book-card__label em {
  font-style: normal;
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  display: block;
  margin-top: var(--space-1);
  opacity: 0.85;
}

/* ── Tagline ── */
.tagline {
  text-align: center;
  padding-inline: var(--container-pad);
  padding-bottom: var(--space-6);
  font-family: 'Playfair Display', serif;
  font-style: italic;
  font-size: var(--text-lg);
  color: var(--color-ink-soft);
  max-width: 700px;
  margin-inline: auto;
}

/* ── Keyframes ── */
@keyframes heroEntrance {
  from {
    opacity: 0;
    transform: translateY(40px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* ── Responsive ── */
@media (max-width: 900px) {
  .book-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero__logo-title { font-size: 3.5rem; }
}

@media (max-width: 500px) {
  .book-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
  }
  .hero__logo-title { font-size: 2.8rem; }
  .hero__logo-sub   { font-size: 1.8rem; }
}