/* =========================================================
   solver-guide.css — Solver Page Layout & Guide Section Styles
   ========================================================= */

/* --- Solver Page Body Overrides --- */
body:has(.solver-guide-section) {
  display: block;
  align-items: unset;
  overflow-x: hidden;
  overflow-y: auto;
  background-attachment: fixed;
}

/* --- Solver View Section (Full Viewport) --- */
#solve-2x2-view,
#solve-3x3-view,
#solve-4x4-view,
#solve-5x5-view {
  position: relative;
  width: 100%;
  height: 100vh;
  min-height: 600px;
}

/* --- Three.js Canvas Containers for Solvers --- */
#app-2x2,
#app-3x3,
#app-4x4,
#app-5x5 {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  min-height: 600px;
  z-index: 1;
}

/* --- Scroll Hint (reuse from cube-facts) --- */
.solver-scroll-hint {
  position: absolute;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  color: #94a3b8;
  font-size: 0.85rem;
  font-weight: 500;
  z-index: 15;
  pointer-events: none;
  opacity: 0.7;
  animation: solverFadeIn 1s ease 2s forwards;
}

@keyframes solverFadeIn {
  to { opacity: 1; }
}

.solver-scroll-hint .bounce-icon {
  animation: solverBounce 1.8s ease-in-out infinite;
}

@keyframes solverBounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

/* =========================================================
   Guide Section Container
   ========================================================= */
.solver-guide-section {
  position: relative;
  width: 100%;
  padding: 5rem 2rem 4rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 5;
  overflow: hidden;
}

/* Ambient glows */
.guide-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.2;
  pointer-events: none;
  animation: guideGlowPulse 10s ease-in-out infinite;
}

.guide-glow-1 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, #3b82f6, transparent 70%);
  top: -60px;
  right: -100px;
  animation-delay: 0s;
}

.guide-glow-2 {
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, #a855f7, transparent 70%);
  bottom: 80px;
  left: -80px;
  animation-delay: 5s;
}

@keyframes guideGlowPulse {
  0%, 100% { transform: scale(1); opacity: 0.2; }
  50% { transform: scale(1.15); opacity: 0.4; }
}

/* --- Section Header --- */
.guide-header {
  text-align: center;
  max-width: 700px;
  margin-bottom: 3rem;
  position: relative;
  z-index: 1;
}

.guide-header .guide-icon-wrap {
  width: 68px;
  height: 68px;
  margin: 0 auto 1.25rem;
  border-radius: 20px;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(168, 85, 247, 0.15));
  border: 1px solid rgba(59, 130, 246, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: #3b82f6;
  animation: guideIconFloat 3s ease-in-out infinite;
}

@keyframes guideIconFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

.guide-title {
  font-size: 2.4rem;
  font-weight: 700;
  background: linear-gradient(135deg, #3b82f6, #a855f7);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.75rem;
  text-shadow: none;
  letter-spacing: -0.5px;
}

.guide-subtitle {
  font-size: 1.05rem;
  color: #64748b;
  line-height: 1.7;
}

/* --- Divider (between solver and guide) --- */
.solver-guide-divider {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 0 0;
}

.solver-guide-divider .divider-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, transparent, rgba(148, 163, 184, 0.3), transparent);
  max-width: 400px;
}

.solver-guide-divider .divider-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #94a3b8;
  font-size: 0.9rem;
  margin: 0 1rem;
  backdrop-filter: blur(8px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  animation: guideIconFloat 3s ease-in-out infinite;
}

/* =========================================================
   Step Cards — Numbered how-to guide
   ========================================================= */
.guide-steps {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  max-width: 900px;
  width: 100%;
  position: relative;
  z-index: 1;
  margin-bottom: 3rem;
}

.guide-step {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 22px;
  padding: 1.75rem 2rem;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.05);
  transition: transform 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275),
              box-shadow 0.35s ease,
              border-color 0.35s ease;
  position: relative;
  overflow: hidden;
  opacity: 0;
  transform: translateY(30px);
}

.guide-step.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.55s ease, transform 0.55s ease,
              box-shadow 0.35s ease, border-color 0.35s ease;
}

.guide-step:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.1);
  border-color: color-mix(in srgb, var(--step-color, #60a5fa) 40%, transparent);
}

/* Step number badge */
.step-number {
  width: 52px;
  height: 52px;
  flex-shrink: 0;
  border-radius: 16px;
  background: var(--step-bg, rgba(59, 130, 246, 0.1));
  border: 1px solid var(--step-border, rgba(59, 130, 246, 0.2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--step-color, #3b82f6);
  transition: transform 0.3s ease;
}

.guide-step:hover .step-number {
  transform: scale(1.1) rotate(-5deg);
}

.step-content {
  flex: 1;
}

.step-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 0.5rem;
}

.step-desc {
  font-size: 0.95rem;
  color: #475569;
  line-height: 1.75;
  margin: 0;
}

.step-desc .highlight {
  font-weight: 700;
  color: #2563eb;
  background: rgba(59, 130, 246, 0.08);
  padding: 0.1rem 0.45rem;
  border-radius: 6px;
}

/* =========================================================
   Info Cards — Two-column grid for tips & info
   ========================================================= */
.guide-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  max-width: 900px;
  width: 100%;
  position: relative;
  z-index: 1;
  margin-bottom: 3rem;
}

.guide-card {
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 22px;
  padding: 2rem;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.05);
  transition: transform 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275),
              box-shadow 0.35s ease, border-color 0.35s ease;
  position: relative;
  overflow: hidden;
  opacity: 0;
  transform: translateY(30px);
}

.guide-card.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.55s ease, transform 0.55s ease,
              box-shadow 0.35s ease, border-color 0.35s ease;
}

.guide-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.1);
  border-color: color-mix(in srgb, var(--card-accent, #60a5fa) 40%, transparent);
}

.guide-card.wide {
  grid-column: 1 / -1;
}

.guide-card-header {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 1rem;
}

.guide-card-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: 12px;
  background: var(--card-icon-bg, rgba(59, 130, 246, 0.1));
  border: 1px solid var(--card-icon-border, rgba(59, 130, 246, 0.2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--card-icon-color, #3b82f6);
  transition: transform 0.3s ease;
}

.guide-card:hover .guide-card-icon {
  transform: scale(1.1) rotate(-5deg);
}

.guide-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #0f172a;
}

.guide-card-body p {
  font-size: 0.95rem;
  color: #475569;
  line-height: 1.75;
  margin: 0;
}

.guide-card-body ul {
  list-style: none;
  padding: 0;
  margin: 0.5rem 0 0;
}

.guide-card-body ul li {
  font-size: 0.95rem;
  color: #475569;
  line-height: 1.75;
  padding: 0.35rem 0 0.35rem 1.5rem;
  position: relative;
}

.guide-card-body ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.85rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--card-icon-color, #3b82f6);
  opacity: 0.6;
}

/* =========================================================
   Color Reference Strip
   ========================================================= */
.color-ref-strip {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
  max-width: 700px;
  width: 100%;
  margin-bottom: 3rem;
  position: relative;
  z-index: 1;
}

.color-ref-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 14px;
  padding: 0.6rem 1.2rem;
  backdrop-filter: blur(12px);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
  opacity: 0;
  transform: translateY(15px);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.color-ref-item.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.4s ease, transform 0.4s ease,
              box-shadow 0.3s ease;
}

.color-ref-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
}

.color-swatch {
  width: 24px;
  height: 24px;
  border-radius: 6px;
  border: 2px solid rgba(0, 0, 0, 0.1);
  flex-shrink: 0;
}

.color-ref-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: #334155;
}

.color-ref-face {
  font-size: 0.75rem;
  font-weight: 500;
  color: #94a3b8;
}

/* =========================================================
   Solver Page Footer
   ========================================================= */
.solver-page-footer {
  padding: 2rem;
  text-align: center;
  border-top: 1px solid rgba(148, 163, 184, 0.2);
  background: rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(8px);
}

.solver-page-footer p {
  font-size: 0.85rem;
  color: #94a3b8;
}

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 900px) {
  .guide-cards {
    grid-template-columns: 1fr;
  }

  .guide-card.wide {
    grid-column: auto;
  }
}

@media (max-width: 600px) {
  .guide-step {
    flex-direction: column;
    gap: 1rem;
  }

  .step-number {
    width: 44px;
    height: 44px;
    font-size: 1.1rem;
  }

  .guide-title {
    font-size: 1.8rem;
  }

  .color-ref-strip {
    gap: 0.6rem;
  }
}