/* ============================================
   Bubble Blend - Reusable Components
   ============================================ */

/* --- Navigation --- */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13, 13, 26, 0.95);
  backdrop-filter: blur(10px);
  border-block-end: 1px solid var(--border);
  padding-block: 12px;
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}

.nav-brand img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.nav-brand span {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
  text-decoration: none;
}

.lang-select {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 4px 8px;
  font-size: 0.85rem;
  cursor: pointer;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 4px;
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    inset-inline-start: 0;
    inset-inline-end: 0;
    background: var(--bg-primary);
    border-block-end: 1px solid var(--border);
    flex-direction: column;
    padding: 16px;
    gap: 16px;
  }

  .nav-links.open {
    display: flex;
  }
}

/* --- Footer --- */

.footer {
  border-block-start: 1px solid var(--border);
  padding-block: 40px;
  margin-block-start: 32px;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-brand img {
  width: 28px;
  height: 28px;
}

.footer-brand span {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.85rem;
}

@media (max-width: 600px) {
  .footer-content {
    flex-direction: column;
    text-align: center;
  }
}

/* --- Cards --- */

.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.card-icon {
  width: 56px;
  height: 56px;
  margin-block-end: 12px;
}

.card h3 {
  margin-block-end: 8px;
}

.card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.card-grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

/* --- Buttons --- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: var(--radius-xl);
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  transition: all 0.2s;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-dim));
  color: #1a1a2e;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--accent-hover), var(--accent));
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-primary img {
  width: 24px;
  height: 24px;
}

.btn-secondary {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--accent);
  text-decoration: none;
}

/* --- Carousel --- */

.carousel {
  position: relative;
  overflow: hidden;
}

.carousel-track {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding-block: 8px;
}

.carousel-track::-webkit-scrollbar {
  display: none;
}

.carousel-track img {
  flex-shrink: 0;
  width: 220px;
  height: auto;
  border-radius: var(--radius-md);
  scroll-snap-align: start;
  border: 1px solid var(--border);
}

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(13, 13, 26, 0.8);
  color: var(--accent);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  transition: background 0.2s;
}

.carousel-btn:hover {
  background: var(--bg-secondary);
}

.carousel-btn--prev {
  inset-inline-start: 8px;
}

.carousel-btn--next {
  inset-inline-end: 8px;
}

@media (max-width: 768px) {
  .carousel-track img {
    width: 180px;
  }
}

/* --- Difficulty bars --- */

.difficulty {
  display: flex;
  gap: 4px;
  align-items: center;
}

.difficulty-bar {
  width: 24px;
  height: 6px;
  border-radius: 3px;
  background: var(--border);
}

.difficulty-bar.filled {
  background: var(--accent);
}

/* --- Image grid --- */

.img-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.img-grid img {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

/* --- Highlight box --- */

.highlight {
  background: var(--bg-secondary);
  border-inline-start: 3px solid var(--accent);
  padding: 12px 16px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-block: 16px;
}

/* --- Bullet list --- */

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: var(--text-secondary);
}

.feature-list li::before {
  content: "\2713";
  color: var(--accent);
  font-weight: 700;
  flex-shrink: 0;
}