/* 404 page (src/app/not-found.tsx). Colors match the blog theme. */
.nf {
  --nf-bg: #121212;
  --nf-surface: #1b1b1b;
  --nf-border: #2c2c2c;
  --nf-text: #e8e8e8;
  --nf-muted: #9aa0a6;
  --nf-accent: #42a5f5;
  --nf-accent-strong: #1e88e5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--nf-bg);
  color: var(--nf-text);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.6;
}

body:has(.nf) {
  margin: 0;
  background: #121212;
}

.nf a {
  color: inherit;
  text-decoration: none;
}

.nf-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--nf-border);
}

.nf-logo {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 1px;
}

.nf-main {
  flex: 1;
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 64px 16px 48px;
  text-align: center;
}

.nf-code {
  margin: 0;
  font-size: clamp(88px, 22vw, 160px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -4px;
  background: linear-gradient(135deg, #90caf9, var(--nf-accent-strong));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nf-title {
  margin: 16px 0 8px;
  font-size: clamp(24px, 5vw, 32px);
  font-weight: 700;
}

.nf-text {
  margin: 0 auto;
  max-width: 480px;
  color: var(--nf-muted);
}

.nf-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 32px;
}

.nf-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid var(--nf-border);
  border-radius: 999px;
  background: var(--nf-surface);
  font-size: 15px;
  font-weight: 600;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}

.nf-btn:hover,
.nf-btn:focus-visible {
  border-color: var(--nf-accent);
  color: var(--nf-accent);
}

.nf-btn--primary {
  background: var(--nf-accent-strong);
  border-color: var(--nf-accent-strong);
  color: #fff !important;
}

.nf-btn--primary:hover,
.nf-btn--primary:focus-visible {
  background: var(--nf-accent);
  border-color: var(--nf-accent);
}

.nf a:focus-visible {
  outline: 2px solid #90caf9;
  outline-offset: 3px;
}

.nf-posts {
  margin-top: 56px;
  text-align: left;
}

.nf-posts h2 {
  margin: 0 0 12px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--nf-muted);
}

.nf-posts ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.nf-posts a {
  display: grid;
  gap: 2px;
  padding: 14px 18px;
  border: 1px solid var(--nf-border);
  border-radius: 12px;
  background: var(--nf-surface);
  transition: border-color 0.2s, transform 0.2s;
}

.nf-posts a:hover {
  border-color: rgba(66, 165, 245, 0.5);
  transform: translateY(-2px);
}

.nf-posts__cat {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--nf-accent);
}

.nf-posts__title {
  font-weight: 600;
}

.nf-posts__meta {
  font-size: 13px;
  color: var(--nf-muted);
}

.nf-footer {
  padding: 20px 16px;
  border-top: 1px solid var(--nf-border);
  text-align: center;
  font-size: 13px;
  color: var(--nf-muted);
}