:root {
  --bg: #0f1117;
  --bg-card: #181b25;
  --bg-card-hover: #1f2330;
  --text: #e8eaf0;
  --text-muted: #9aa1b5;
  --accent: #7c5cff;
  --accent-2: #36d399;
  --border: #2a2f40;
  --warn-bg: #2a2438;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.7;
  font-size: 17px;
}

.container { max-width: 860px; margin: 0 auto; padding: 0 20px; }

/* Header */
header {
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
  position: sticky;
  top: 0;
  background: rgba(15, 17, 23, 0.95);
  backdrop-filter: blur(8px);
  z-index: 10;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; }
.logo { font-size: 20px; font-weight: 800; color: var(--text); text-decoration: none; }
.logo span { color: var(--accent); }
nav a {
  color: var(--text-muted);
  text-decoration: none;
  margin-left: 22px;
  font-size: 15px;
  font-weight: 500;
}
nav a:hover { color: var(--text); }

/* Hero */
.hero { padding: 56px 0 40px; }
.hero h1 { font-size: 34px; line-height: 1.25; margin-bottom: 14px; }
.hero p { color: var(--text-muted); font-size: 18px; max-width: 640px; }

/* Cards grid */
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; padding: 24px 0 56px; }
@media (max-width: 700px) { .grid { grid-template-columns: 1fr; } }
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 22px;
  text-decoration: none;
  color: var(--text);
  display: block;
  transition: background 0.15s, transform 0.15s;
}
.card:hover { background: var(--bg-card-hover); transform: translateY(-2px); }
.card .tag { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--accent-2); }
.card h3 { font-size: 19px; margin: 8px 0 8px; line-height: 1.35; }
.card p { color: var(--text-muted); font-size: 15px; }

/* Article */
article { padding: 48px 0 32px; }
article h1 { font-size: 32px; line-height: 1.25; margin-bottom: 10px; }
article .meta { color: var(--text-muted); font-size: 14px; margin-bottom: 28px; }
article h2 { font-size: 24px; margin: 36px 0 14px; }
article h3 { font-size: 19px; margin: 26px 0 10px; }
article p { margin-bottom: 16px; }
article ul, article ol { margin: 0 0 16px 24px; }
article li { margin-bottom: 8px; }
article a { color: var(--accent); }
article strong { color: var(--text); }

/* Tables */
table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 15px; }
th, td { border: 1px solid var(--border); padding: 10px 12px; text-align: left; }
th { background: var(--bg-card); }

/* Boxes */
.disclosure {
  background: var(--warn-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 18px;
  font-size: 14px;
  color: var(--text-muted);
  margin: 24px 0;
}
.tip {
  background: var(--bg-card);
  border-left: 3px solid var(--accent-2);
  border-radius: 0 10px 10px 0;
  padding: 14px 18px;
  margin: 20px 0;
}
.cta {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  padding: 12px 24px;
  border-radius: 10px;
  text-decoration: none;
  margin: 8px 0 16px;
}
.cta:hover { opacity: 0.9; }

/* Footer */
footer {
  border-top: 1px solid var(--border);
  margin-top: 48px;
  padding: 28px 0 40px;
  color: var(--text-muted);
  font-size: 14px;
}
footer a { color: var(--text-muted); }