:root {
  --nyxel-bg: #ffffff;
  --nyxel-bg-alt: #f5f6f8;
  --nyxel-text: #14213d;
  --nyxel-text-muted: #4a5568;
  --nyxel-accent: #f2751a;
  --nyxel-border: #e5e7eb;
}

[data-theme="dark"] {
  --nyxel-bg: #1d1e20;
  --nyxel-bg-alt: #2e2e33;
  --nyxel-text: #dadadb;
  --nyxel-text-muted: #9b9c9d;
  --nyxel-accent: #ff8a3d;
  --nyxel-border: #333333;
}

/* ---------- Trang chủ ---------- */

.nyxel-home {
  background: var(--nyxel-bg);
}

.nyxel-container {
  max-width: 1024px;
  margin: 0 auto;
  padding: 0 24px;
}

.nyxel-hero {
  text-align: center;
  padding: 64px 24px 48px;
  background: var(--nyxel-bg);
}

.nyxel-hero h1 {
  font-size: 2.25rem;
  line-height: 1.25;
  color: var(--nyxel-text);
  margin: 0 0 16px;
}

.nyxel-hero p {
  font-size: 1.05rem;
  color: var(--nyxel-text-muted);
  max-width: 640px;
  margin: 0 auto;
}

.nyxel-categories {
  padding: 32px 0 56px;
  background: var(--nyxel-bg-alt);
}

.nyxel-card-grid,
.nyxel-how-grid,
.nyxel-post-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.nyxel-card {
  display: flex;
  flex-direction: column;
  background: var(--nyxel-bg);
  border: 1px solid var(--nyxel-border);
  border-radius: 10px;
  padding: 24px;
  text-decoration: none;
  color: inherit;
  transition: border-color .15s ease, transform .15s ease;
}

.nyxel-card:hover {
  border-color: var(--nyxel-accent);
  transform: translateY(-2px);
}

.nyxel-card-icon {
  width: 40px;
  height: 40px;
  color: var(--nyxel-accent);
  margin-bottom: 12px;
}

.nyxel-card-icon svg {
  width: 100%;
  height: 100%;
}

.nyxel-card h2 {
  font-size: 1.1rem;
  color: var(--nyxel-text);
  margin: 0 0 8px;
}

.nyxel-card p {
  font-size: .9rem;
  color: var(--nyxel-text-muted);
  margin: 0 0 16px;
  flex-grow: 1;
}

.nyxel-card-link {
  font-size: .85rem;
  font-weight: 600;
  color: var(--nyxel-accent);
}

.nyxel-how {
  padding: 56px 0;
  background: var(--nyxel-bg);
}

.nyxel-latest {
  padding: 56px 0 72px;
  background: var(--nyxel-bg-alt);
}

.nyxel-how h2,
.nyxel-latest h2 {
  text-align: center;
  color: var(--nyxel-accent);
  font-size: 1.4rem;
  text-transform: uppercase;
  letter-spacing: .03em;
  margin: 0 0 32px;
}

.nyxel-how-item h3 {
  color: var(--nyxel-text);
  font-size: 1.05rem;
  margin: 0 0 8px;
}

.nyxel-how-item p {
  color: var(--nyxel-text-muted);
  font-size: .9rem;
  margin: 0;
}

.nyxel-post-card {
  display: block;
  background: var(--nyxel-bg);
  border: 1px solid var(--nyxel-border);
  border-radius: 10px;
  padding: 20px;
  text-decoration: none;
  color: inherit;
}

.nyxel-post-card:hover {
  border-color: var(--nyxel-accent);
}

.nyxel-post-card h3 {
  color: var(--nyxel-text);
  font-size: 1rem;
  margin: 0 0 8px;
}

.nyxel-post-card p {
  color: var(--nyxel-text-muted);
  font-size: .85rem;
  margin: 0;
}

.nyxel-empty-state {
  text-align: center;
  color: var(--nyxel-text-muted);
  max-width: 520px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ---------- Footer links (mọi trang) ---------- */

.nyxel-footer-links {
  text-align: center;
  padding: 12px 24px 20px;
  font-size: .85rem;
  color: var(--nyxel-text-muted);
}

.nyxel-footer-links a {
  color: var(--nyxel-text-muted);
  text-decoration: none;
}

.nyxel-footer-links a:hover {
  color: var(--nyxel-accent);
}

.nyxel-footer-links span {
  margin: 0 8px;
  color: var(--nyxel-border);
}

/* ---------- Responsive ---------- */

@media (max-width: 768px) {
  .nyxel-hero {
    padding: 40px 20px 32px;
  }

  .nyxel-hero h1 {
    font-size: 1.6rem;
  }

  .nyxel-card-grid,
  .nyxel-how-grid,
  .nyxel-post-grid {
    grid-template-columns: 1fr;
  }

  .nyxel-footer-links {
    font-size: .8rem;
  }

  .nyxel-footer-links span {
    margin: 0 4px;
  }
}