/* Level selection screen: choose quiz depth */

#levelSelect { display: none; }

.level-select-wrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 0 48px;
}

.level-select-header {
  text-align: center;
  margin-bottom: 44px;
  padding-top: 24px;
}

/* === LEVEL CARDS GRID === */

.level-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 36px;
}

/* === INDIVIDUAL CARD === */

.level-card {
  position: relative;
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: 22px;
  padding: 36px 24px 28px;
  text-align: center;
  cursor: pointer;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow: hidden;
}

.level-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  opacity: 0;
  transition: opacity 0.35s;
}

.level-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 16px 48px rgba(54, 43, 43, 0.1), 0 4px 12px rgba(54, 43, 43, 0.05);
  border-color: transparent;
}

.level-card:hover::before {
  opacity: 1;
}

/* Card variants - gradient strips */
.level-card--essentials::before {
  background: linear-gradient(90deg, #d4a04a, #c06b5e);
}

.level-card--deep::before {
  background: linear-gradient(90deg, #c06b5e, #9b7db8);
}

.level-card--full::before {
  background: linear-gradient(90deg, #9b7db8, #c06b5e, #d4a04a);
}

/* === FEATURED CARD (Recommended) === */

.level-card--featured {
  border-color: rgba(192, 107, 94, 0.3);
  box-shadow: 0 4px 24px rgba(192, 107, 94, 0.1);
  background: linear-gradient(180deg, rgba(192, 107, 94, 0.03) 0%, var(--card) 40%);
}

.level-card--featured::before {
  opacity: 1;
}

.level-card--featured:hover {
  box-shadow: 0 16px 48px rgba(192, 107, 94, 0.15), 0 4px 12px rgba(192, 107, 94, 0.08);
}

.level-card-ribbon {
  position: absolute;
  top: 14px;
  right: -32px;
  background: linear-gradient(135deg, var(--primary), #9b7db8);
  color: #fff;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  padding: 5px 40px;
  transform: rotate(35deg);
  box-shadow: 0 2px 8px rgba(192, 107, 94, 0.3);
}

/* === DEPTH VISUALIZATION === */

.level-card-depth {
  position: relative;
  width: 88px;
  height: 88px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.depth-ring {
  position: absolute;
  border-radius: 50%;
  border: 2px solid;
  transition: all 0.4s ease;
}

.ring-1 {
  width: 32px;
  height: 32px;
  border-color: var(--primary);
  background: radial-gradient(circle, rgba(192, 107, 94, 0.15) 0%, rgba(192, 107, 94, 0.05) 100%);
  animation: ringPulse 3.5s ease-in-out infinite;
}

.ring-2 {
  width: 56px;
  height: 56px;
  border-color: rgba(155, 125, 184, 0.6);
  background: radial-gradient(circle, rgba(155, 125, 184, 0.08) 0%, transparent 100%);
  animation: ringPulse 3.5s ease-in-out infinite 0.6s;
}

.ring-3 {
  width: 80px;
  height: 80px;
  border-color: rgba(212, 160, 74, 0.45);
  background: radial-gradient(circle, rgba(212, 160, 74, 0.06) 0%, transparent 100%);
  animation: ringPulse 3.5s ease-in-out infinite 1.2s;
}

@keyframes ringPulse {
  0%, 100% { transform: scale(1); opacity: 0.6; }
  50% { transform: scale(1.08); opacity: 1; }
}

.level-card:hover .depth-ring {
  animation-play-state: paused;
  opacity: 1;
  transform: scale(1.06);
}

/* === CARD CONTENT === */

.level-card-tag {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.4px;
  color: var(--muted);
  margin-bottom: 6px;
}

.level-card-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.level-card-desc {
  font-size: 0.87rem;
  color: var(--muted);
  line-height: 1.65;
  margin-bottom: 20px;
  flex: 1;
}

/* === CARD META (stats) === */

.level-card-meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 100%;
  margin-bottom: 20px;
}

.level-meta-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  justify-content: center;
}

.level-meta-item svg {
  color: var(--primary);
  opacity: 0.6;
  flex-shrink: 0;
}

/* === CARD BUTTONS === */

.btn-level {
  width: 100%;
  padding: 14px 24px;
  border-radius: 14px;
  font-size: 0.92rem;
  font-weight: 700;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.3s ease;
  letter-spacing: 0.01em;
}

.btn-level svg {
  transition: transform 0.25s ease;
}

.btn-level:hover svg {
  transform: translateX(3px);
}

.btn-level--essentials {
  background: linear-gradient(135deg, #d4a04a, #c8943f);
  color: #fff;
}

.btn-level--essentials:hover {
  background: linear-gradient(135deg, #c8943f, #b88535);
  box-shadow: 0 4px 16px rgba(212, 160, 74, 0.35);
  transform: translateY(-1px);
}

.btn-level--deep {
  background: linear-gradient(135deg, var(--primary), #a85a4e);
  color: #fff;
}

.btn-level--deep:hover {
  background: linear-gradient(135deg, #a85a4e, #954e42);
  box-shadow: 0 4px 16px rgba(192, 107, 94, 0.35);
  transform: translateY(-1px);
}

.btn-level--full {
  background: linear-gradient(135deg, #9b7db8, #856ba3);
  color: #fff;
}

.btn-level--full:hover {
  background: linear-gradient(135deg, #856ba3, #745a92);
  box-shadow: 0 4px 16px rgba(155, 125, 184, 0.35);
  transform: translateY(-1px);
}

/* === BACK BUTTON === */

.level-back {
  text-align: center;
}

/* === ANIMATIONS === */

.level-card {
  animation: levelCardIn 0.6s cubic-bezier(0.4, 0, 0.2, 1) both;
}

.level-card:nth-child(1) { animation-delay: 0.1s; }
.level-card:nth-child(2) { animation-delay: 0.2s; }
.level-card:nth-child(3) { animation-delay: 0.3s; }

@keyframes levelCardIn {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* === RESPONSIVE === */

@media (max-width: 768px) {
  .level-cards {
    grid-template-columns: 1fr;
    max-width: 420px;
    margin-left: auto;
    margin-right: auto;
  }

  .level-select-header {
    padding-top: 16px;
    margin-bottom: 32px;
  }

  .level-card {
    padding: 32px 20px 24px;
  }

  .level-card-ribbon {
    top: 12px;
    right: -34px;
    font-size: 0.62rem;
  }

  .level-card-meta {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px;
  }

  .level-meta-item {
    font-size: 0.75rem;
  }
}

@media (min-width: 1024px) {
  .level-select-wrap {
    max-width: 1040px;
    padding: 32px 0 56px;
  }

  .level-cards {
    gap: 24px;
  }

  .level-card {
    padding: 40px 28px 32px;
  }

  .level-card-name {
    font-size: 1.5rem;
  }

  .level-card-desc {
    font-size: 0.92rem;
  }
}

@media (min-width: 1400px) {
  .level-select-wrap {
    max-width: 1160px;
    padding: 40px 0 64px;
  }

  .level-cards {
    gap: 28px;
  }

  .level-card {
    padding: 48px 32px 36px;
  }

  .level-card-depth {
    width: 100px;
    height: 100px;
    margin-bottom: 24px;
  }

  .ring-1 { width: 36px; height: 36px; }
  .ring-2 { width: 64px; height: 64px; }
  .ring-3 { width: 92px; height: 92px; }

  .level-card-name {
    font-size: 1.65rem;
  }

  .level-card-desc {
    font-size: 0.95rem;
  }

  .btn-level {
    padding: 16px 28px;
    font-size: 0.98rem;
  }
}