/* ============================================
   Rubik's Cube Sample Demo — substyle.css
   ============================================ */

/* === HERO === */
.solver-hero {
  min-height: 32vh;
  display: flex;
  align-items: flex-end;
  padding: calc(var(--nav-height) + 64px) 5% 56px;
  position: relative;
  overflow: hidden;
}

.solver-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 60% at 15% 50%, rgba(76,81,191,0.16) 0%, transparent 70%),
              radial-gradient(ellipse 50% 50% at 85% 20%, rgba(124,58,237,0.10) 0%, transparent 60%);
  pointer-events: none;
}

.solver-hero h1 {
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 14px;
}

.solver-hero p {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 500px;
  line-height: 1.8;
  margin-top: 10px;
}

/* === TWO-COLUMN LAYOUT === */
.solver-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  padding: 0 5% 100px;
  max-width: 1140px;
  margin: 0 auto;
  width: 100%;
  box-sizing: border-box;
}

/* === SHARED CARD STYLES === */
.solver-card {
  padding: 32px;
}

.solver-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
  letter-spacing: -0.01em;
}

.solver-card-desc {
  font-size: 0.87rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  line-height: 1.6;
}

/* === RIGHT COLUMN === */
.solver-right {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* === SAMPLE THUMBNAIL GRID === */
.sample-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.sample-thumb {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 14px 10px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
  transition: border-color 0.25s ease, background 0.25s ease, transform 0.25s ease;
  cursor: pointer;
}

.sample-thumb:hover {
  border-color: rgba(124,58,237,0.35);
  background: rgba(124,58,237,0.06);
  transform: translateY(-2px);
}

.img-ico1 {
  width: 72px;
  height: 72px;
  object-fit: contain;
  border-radius: 10px;
  transition: transform 0.25s ease;
  cursor: pointer;
  display: block;
}

.img-ico1:hover {
  transform: scale(1.06);
}

/* Selected state — applied by change.js */
.img-act {
  outline: 2px solid var(--secondary);
  outline-offset: 3px;
  border-radius: 10px;
}

.sample-thumb:has(.img-act) {
  border-color: rgba(124,58,237,0.6);
  background: rgba(124,58,237,0.1);
}

.thumb-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* === CUBE FACE GRID === */
.cube-faces {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.face-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.face-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

/* === FACE COLOR TABLES === */
.setcolor {
  border-collapse: separate;
  border-spacing: 3px;
  background: rgba(0,0,0,0.4);
  border-radius: 10px;
  padding: 4px;
}

.setcolor td {
  width: 22px;
  height: 22px;
  border-radius: 5px;
}

/* === SOLVE ACTION CARD === */
.solve-action {
  padding: 28px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.solve-note {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 300px;
}

.solve-note strong {
  color: var(--text);
}

.solve-btn {
  white-space: nowrap;
  flex-shrink: 0;
}

/* ============================================
   MOBILE
   ============================================ */

@media (max-width: 960px) {
  .solver-layout {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 0 5% 80px;
  }
}

@media (max-width: 600px) {
  .solver-hero {
    padding: calc(var(--nav-height) + 40px) 5% 40px;
    min-height: 28vh;
  }

  .solver-card {
    padding: 24px 20px;
  }

  .sample-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
  }

  .img-ico1 {
    width: 56px;
    height: 56px;
  }

  .cube-faces {
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
  }

  .setcolor td {
    width: 16px;
    height: 16px;
    border-radius: 3px;
  }

  .solve-action {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    padding: 24px 20px;
  }

  .solve-btn {
    width: 100%;
    justify-content: center;
  }
}