:root {
  --bg: #0d0f1a;
  --surface: #131629;
  --surface-2: #1b1f38;
  --border: rgba(255, 255, 255, 0.1);
  --text: #e2e8f0;
  --muted: #98a2b3;
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --accent: #22d3ee;
  --max: 860px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: radial-gradient(circle at 10% 10%, rgba(99, 102, 241, 0.22), transparent 40%),
              radial-gradient(circle at 90% 90%, rgba(34, 211, 238, 0.12), transparent 35%),
              var(--bg);
  color: var(--text);
  line-height: 1.75;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  width: min(var(--max), calc(100% - 2.25rem));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(13, 15, 26, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  color: var(--text);
  font-weight: 800;
  letter-spacing: 0.01em;
}

.home-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 999px;
  padding: 0.5rem 0.9rem;
  font-size: 0.9rem;
  font-weight: 600;
}

.home-link:hover {
  background: rgba(255, 255, 255, 0.06);
  text-decoration: none;
}

.hero {
  padding: 3.5rem 0 1.5rem;
}

.kicker {
  display: inline-block;
  font-size: 0.76rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--primary);
  font-weight: 700;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 1.13;
  margin: 0.75rem 0 1rem;
}

.hero p {
  color: var(--muted);
  margin: 0;
  max-width: 70ch;
}

.blog-list {
  padding: 1.5rem 0 3.5rem;
}

.cards {
  display: grid;
  gap: 1rem;
}

.card {
  background: linear-gradient(165deg, rgba(27, 31, 56, 0.98), rgba(19, 22, 41, 0.98));
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.15rem 1.2rem;
}

.card h2 {
  margin: 0;
  font-size: clamp(1.15rem, 2.5vw, 1.4rem);
  line-height: 1.35;
}

.card p {
  color: var(--muted);
  margin: 0.7rem 0 0.9rem;
}

.meta {
  color: var(--muted);
  font-size: 0.87rem;
}

.read-btn {
  display: inline-block;
  border-radius: 10px;
  border: 1px solid rgba(99, 102, 241, 0.55);
  background: rgba(99, 102, 241, 0.12);
  color: #dfe3ff;
  padding: 0.5rem 0.8rem;
  font-weight: 600;
  margin-top: 0.2rem;
}

.read-btn:hover {
  background: rgba(99, 102, 241, 0.22);
  text-decoration: none;
}

.article-wrap {
  padding: 2.5rem 0 4rem;
}

.article {
  background: linear-gradient(180deg, rgba(19, 22, 41, 0.96), rgba(13, 15, 26, 0.98));
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: clamp(1.1rem, 2vw, 1.8rem);
}

.article h1 {
  margin-top: 0.45rem;
}

.article h2 {
  margin: 2rem 0 0.7rem;
  font-size: clamp(1.25rem, 3vw, 1.6rem);
}

.article h3 {
  margin: 1.2rem 0 0.5rem;
  font-size: 1.05rem;
}

.article p,
.article li {
  color: #d6deea;
}

.article ul,
.article ol {
  padding-left: 1.2rem;
}

.article-figure {
  margin: 1rem 0 1.5rem;
}

.article-figure img {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--border);
  display: block;
}

.article-figure figcaption {
  margin-top: 0.45rem;
  font-size: 0.88rem;
  color: var(--muted);
}

.tip {
  border-left: 3px solid var(--primary);
  background: rgba(99, 102, 241, 0.1);
  padding: 0.7rem 0.9rem;
  border-radius: 6px;
  margin: 1rem 0;
}

.cta-box {
  margin-top: 2.2rem;
  border: 1px solid rgba(34, 211, 238, 0.38);
  background: rgba(34, 211, 238, 0.1);
  border-radius: 14px;
  padding: 1rem;
}

.cta-box p {
  margin: 0 0 0.8rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  padding: 0.55rem 0.9rem;
  font-weight: 700;
  color: #fff;
  background: var(--primary);
  border: 1px solid transparent;
}

.btn-primary:hover {
  text-decoration: none;
  background: var(--primary-hover);
}

.inline-links {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.inline-links a {
  margin-right: 0.8rem;
  white-space: nowrap;
}

.faq-list {
  margin-top: 1rem;
}

.faq-item {
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  border-radius: 10px;
  padding: 0.65rem 0.8rem;
}

.faq-item + .faq-item {
  margin-top: 0.65rem;
}

.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--text);
}

.faq-item p {
  margin: 0.55rem 0 0;
}

.search-terms {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.search-terms p {
  font-size: 0.72rem;
  color: var(--muted);
  line-height: 1.7;
  margin: 0;
  opacity: 0.6;
}

.search-terms strong {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  opacity: 0.5;
  margin-bottom: 0.3rem;
}

.site-footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  padding: 1.5rem 0 2rem;
}

@media (max-width: 700px) {
  .header-inner {
    min-height: 62px;
  }

  .home-link {
    font-size: 0.82rem;
    padding: 0.42rem 0.75rem;
  }

  .hero {
    padding-top: 2.2rem;
  }
}