/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --color-bg: #0b0d17;
  --color-surface: #121526;
  --color-text: #e2e8f0;
  --color-text-muted: #8b95b0;
  --color-accent: #818cf8;
  --color-accent-hover: #a78bfa;
  --color-accent-2: #f472b6;
  --color-accent-3: #38bdf8;
  --color-border: #1e2440;
  --color-tag-bg: #161b30;
  --color-tag-text: #a78bfa;
  --gradient-main: linear-gradient(135deg, #818cf8 0%, #c084fc 50%, #38bdf8 100%);
  --gradient-hero: linear-gradient(135deg, #030014 0%, #0a0e27 40%, #0f1635 100%);
  --max-width: 1100px;
  --radius: 12px;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--color-bg);
  background-image:
    radial-gradient(1px 1px at 20% 30%, rgba(255,255,255,.12), transparent),
    radial-gradient(1px 1px at 40% 70%, rgba(255,255,255,.08), transparent),
    radial-gradient(1px 1px at 65% 15%, rgba(255,255,255,.1), transparent),
    radial-gradient(1px 1px at 80% 55%, rgba(255,255,255,.07), transparent),
    radial-gradient(1px 1px at 10% 85%, rgba(255,255,255,.09), transparent),
    radial-gradient(1px 1px at 50% 45%, rgba(255,255,255,.06), transparent),
    radial-gradient(1px 1px at 90% 90%, rgba(255,255,255,.1), transparent),
    radial-gradient(1px 1px at 30% 60%, rgba(255,255,255,.05), transparent);
  background-size: 250px 250px;
  color: var(--color-text);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--color-accent); text-decoration: none; transition: color .2s; }
a:hover { color: var(--color-accent-hover); }
img { max-width: 100%; height: auto; display: block; border-radius: var(--radius); }

/* ===== Header ===== */
.site-header {
  background: rgba(11,13,23,.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: .9rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-logo {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -.02em;
}
.site-logo span {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.site-nav { display: flex; gap: 1.8rem; align-items: center; }
.site-nav a {
  color: var(--color-text-muted);
  font-size: .95rem;
  font-weight: 500;
  transition: color .2s;
}
.site-nav a:hover, .site-nav a.active { color: var(--color-accent); }

/* ===== Language Toggle ===== */
.lang-toggle {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: .3rem .7rem;
  font-size: .82rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--color-text-muted);
  transition: color .2s, border-color .2s, background .2s;
  letter-spacing: .03em;
}
.lang-toggle:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background: rgba(129,140,248,.08);
}

/* ===== Hero ===== */
.hero {
  background: var(--gradient-hero);
  color: #fff;
  text-align: center;
  padding: 5.5rem 1.5rem 5rem;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(circle at 20% 40%, rgba(129,140,248,.2) 0%, transparent 45%),
              radial-gradient(circle at 75% 60%, rgba(56,189,248,.15) 0%, transparent 40%),
              radial-gradient(circle at 50% 20%, rgba(192,132,252,.12) 0%, transparent 50%);
  animation: heroGlow 8s ease-in-out infinite alternate;
}
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 10% 15%, rgba(255,255,255,.6), transparent),
    radial-gradient(1px 1px at 25% 80%, rgba(255,255,255,.4), transparent),
    radial-gradient(1.5px 1.5px at 40% 35%, rgba(255,255,255,.7), transparent),
    radial-gradient(1px 1px at 55% 10%, rgba(255,255,255,.5), transparent),
    radial-gradient(1px 1px at 70% 65%, rgba(255,255,255,.3), transparent),
    radial-gradient(1.5px 1.5px at 85% 25%, rgba(255,255,255,.6), transparent),
    radial-gradient(1px 1px at 15% 55%, rgba(255,255,255,.35), transparent),
    radial-gradient(1px 1px at 90% 85%, rgba(255,255,255,.5), transparent),
    radial-gradient(1.5px 1.5px at 60% 50%, rgba(255,255,255,.4), transparent),
    radial-gradient(1px 1px at 35% 90%, rgba(255,255,255,.45), transparent),
    radial-gradient(1px 1px at 5% 40%, rgba(255,255,255,.3), transparent),
    radial-gradient(1px 1px at 95% 55%, rgba(255,255,255,.5), transparent);
  animation: twinkle 4s ease-in-out infinite alternate;
  pointer-events: none;
}
@keyframes heroGlow {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(2%, -2%) scale(1.05); }
}
@keyframes twinkle {
  0% { opacity: .6; }
  100% { opacity: 1; }
}
.hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: .6rem;
  line-height: 1.2;
  position: relative;
}
.hero h1 .emoji { font-style: normal; }
.hero p {
  font-size: 1.18rem;
  opacity: .85;
  max-width: 620px;
  margin: 0 auto;
  position: relative;
}

/* ===== Main ===== */
.container { max-width: var(--max-width); margin: 0 auto; padding: 2.5rem 1.5rem; flex: 1; }

/* ===== Article Grid ===== */
.section-title {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  padding-bottom: .5rem;
  border-image: var(--gradient-main) 1;
  border-bottom: 3px solid;
  display: inline-block;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.8rem;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
  position: relative;
  cursor: pointer;
}
.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 32px rgba(129,140,248,.15), 0 4px 12px rgba(56,189,248,.1);
  border-color: var(--color-accent);
}

.card-img {
  width: 100%;
  height: 195px;
  object-fit: cover;
  border-radius: 0;
}

.card-body { padding: 1.3rem 1.4rem; }
.card-tag {
  display: inline-block;
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  padding: .25rem .7rem;
  border-radius: 20px;
  margin-bottom: .6rem;
}
.card-tag { background: #1e1b4b; color: #a5b4fc; }
.card-tag--video { background: #1c1017; color: #fca5a5; }
.card-tag--image { background: #0c1f17; color: #6ee7b7; }
.card-tag--guide { background: #1a1508; color: #fcd34d; }
.card-tag--automation { background: #0c1527; color: #93c5fd; }
.card-tag--assistant { background: #1f0c1e; color: #f9a8d4; }
.card-title { font-size: 1.15rem; font-weight: 700; margin-bottom: .45rem; line-height: 1.35; }
.card-title a { color: #f1f5f9; }
.card-title a:hover { color: var(--color-accent); }
.card-title a::after {
  content: '';
  position: absolute;
  inset: 0;
}
.card-excerpt { font-size: .92rem; color: var(--color-text-muted); margin-bottom: .8rem; }
.card-meta { font-size: .8rem; color: #888; }

/* ===== Single Article ===== */
.article-header { text-align: center; margin-bottom: 2rem; }
.article-header h1 { font-size: 2.2rem; font-weight: 800; line-height: 1.25; margin-bottom: .5rem; }
.article-header .meta { color: var(--color-text-muted); font-size: .9rem; }

.article-hero {
  width: 100%;
  max-height: 380px;
  object-fit: cover;
  border-radius: var(--radius);
  margin-bottom: 1.5rem;
  box-shadow: 0 8px 30px rgba(129,140,248,.1);
}

.article-content { max-width: 760px; margin: 0 auto; }
.article-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 2.2rem 0 .8rem;
  color: var(--color-text);
}
.article-content h3 { font-size: 1.2rem; font-weight: 600; margin: 1.6rem 0 .6rem; }
.article-content p { margin-bottom: 1.15rem; }
.article-content ul, .article-content ol { margin: .5rem 0 1.2rem 1.5rem; }
.article-content li { margin-bottom: .35rem; }
.article-content blockquote {
  border-left: 4px solid;
  border-image: var(--gradient-main) 1;
  padding: .8rem 1.2rem;
  margin: 1.5rem 0;
  background: linear-gradient(135deg, #111530 0%, #161030 100%);
  font-style: italic;
  border-radius: 0 var(--radius) var(--radius) 0;
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.2rem 0;
  font-size: .93rem;
}
.article-content th, .article-content td {
  border: 1px solid var(--color-border);
  padding: .6rem .8rem;
  text-align: left;
}
.article-content th { background: var(--color-tag-bg); font-weight: 600; color: var(--color-accent); }

.toc {
  background: linear-gradient(135deg, #111530 0%, #151030 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.3rem 1.5rem;
  margin-bottom: 2rem;
}
.toc h4 { margin-bottom: .6rem; font-size: 1rem; }
.toc ol { margin-left: 1.2rem; }
.toc li { margin-bottom: .3rem; font-size: .93rem; }

/* ===== Related Articles ===== */
.related { margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--color-border); }

/* ===== About Page ===== */
.about-content { max-width: 760px; margin: 0 auto; }
.about-content h2 { font-size: 1.5rem; margin: 2rem 0 .8rem; }
.about-content p { margin-bottom: 1rem; }

/* ===== Footer ===== */
.site-footer {
  background: linear-gradient(135deg, #050510, #0a0e27);
  color: #64709a;
  text-align: center;
  padding: 2.5rem 1.5rem;
  font-size: .85rem;
  margin-top: auto;
  border-top: 1px solid var(--color-border);
}
.site-footer a { color: #818cf8; }
.site-footer a:hover { color: #a78bfa; }

/* ===== Responsive ===== */
/* ===== Nav hover pill ===== */
.site-nav a {
  padding: .35rem .7rem;
  border-radius: 6px;
  transition: color .2s, background .2s;
}
.site-nav a:hover, .site-nav a.active {
  color: var(--color-accent);
  background: rgba(129,140,248,.08);
}

/* ===== Card image overlay ===== */
.card-img-wrap { position: relative; overflow: hidden; }
.card-img { transition: transform .4s ease; }
.card:hover .card-img { transform: scale(1.04); }

/* ===== Responsive ===== */
@media (max-width: 700px) {
  .hero h1 { font-size: 1.9rem; }
  .hero { padding: 3.5rem 1.2rem 3rem; }
  .article-grid { grid-template-columns: 1fr; }
  .header-inner { flex-direction: column; gap: .6rem; }
  .article-header h1 { font-size: 1.6rem; }
}