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

:root {
  --bg:       #0d1117;
  --bg2:      #161b22;
  --bg3:      #21262d;
  --border:   #30363d;
  --accent:   #4a9eff;
  --accent2:  #58d68d;
  --text:     #c9d1d9;
  --text-dim: #8b949e;
  --danger:   #f85149;
  --warn:     #e3b341;
}

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Nav ── */
header {
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 32px;
  height: 56px;
  position: sticky;
  top: 0;
  z-index: 100;
}

header .logo {
  color: var(--accent);
  font-size: 1.2rem;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

nav a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.9rem;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  transition: color .15s, border-color .15s;
}

nav a:hover, nav a.active {
  color: var(--text);
  border-bottom-color: var(--accent);
}

header .nav-right {
  margin-left: auto;
  display: flex;
  gap: 12px;
  align-items: center;
}

/* ── Main ── */
main {
  flex: 1;
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 24px;
  width: 100%;
}

/* ── Hero ── */
.hero {
  text-align: center;
  padding: 60px 0 40px;
}

.hero h1 {
  font-size: 2.4rem;
  color: var(--text);
  margin-bottom: 16px;
}

.hero h1 span { color: var(--accent); }

.hero p {
  font-size: 1.1rem;
  color: var(--text-dim);
  max-width: 600px;
  margin: 0 auto 28px;
  line-height: 1.6;
}

/* ── Cards ── */
.card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 20px;
}

.card h2 {
  color: var(--accent);
  font-size: 1.1rem;
  margin-bottom: 14px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin: 24px 0;
}

/* ── Buttons ── */
.btn {
  display: inline-block;
  padding: 10px 22px;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: opacity .15s;
}

.btn:hover { opacity: .85; }

.btn-primary { background: var(--accent); color: #fff; }
.btn-outline  { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
.btn-danger   { background: var(--danger); color: #fff; }

/* ── Tables ── */
table { border-collapse: collapse; width: 100%; }
th { background: var(--bg3); color: var(--accent); padding: 10px 14px; text-align: left; font-size: 0.85rem; border-bottom: 1px solid var(--border); }
td { padding: 9px 14px; border-bottom: 1px solid var(--border); font-size: 0.875rem; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--bg3); }

/* ── Forms ── */
.field { margin-bottom: 14px; }
label { display: block; font-size: 0.85rem; color: var(--text-dim); margin-bottom: 5px; }
input[type=text], input[type=password], input[type=email], select, textarea {
  width: 100%;
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 0.9rem;
}
input:focus, select:focus { outline: none; border-color: var(--accent); }

/* ── Badges ── */
.badge { display: inline-block; padding: 2px 10px; border-radius: 20px; font-size: 0.78rem; font-weight: 600; }
.badge-on  { background: #1a3a2a; color: var(--accent2); }
.badge-off { background: #3a1a1a; color: var(--danger); }
.badge-warn{ background: #3a2a00; color: var(--warn); }

/* ── Alerts ── */
.alert      { padding: 10px 16px; border-radius: 6px; margin-bottom: 14px; font-size: 0.9rem; }
.alert-ok   { background: #1a3a2a; color: var(--accent2); border-left: 3px solid var(--accent2); }
.alert-warn { background: #3a2a00; color: var(--warn);    border-left: 3px solid var(--warn); }
.alert-err  { background: #3a1a1a; color: var(--danger);  border-left: 3px solid var(--danger); }

/* ── Code blocks (commands) ── */
pre, code {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: 'Courier New', monospace;
  font-size: 0.85rem;
  color: #79c0ff;
}
pre { padding: 16px; overflow-x: auto; margin: 10px 0; }
code { padding: 2px 6px; }

/* ── FAQ ── */
.faq-item { border-bottom: 1px solid var(--border); padding: 18px 0; }
.faq-item h3 { color: var(--accent); margin-bottom: 8px; font-size: 1rem; }
.faq-item p  { color: var(--text-dim); line-height: 1.6; font-size: 0.9rem; }

/* ── Footer ── */
footer {
  background: var(--bg2);
  border-top: 1px solid var(--border);
  text-align: center;
  padding: 16px;
  color: var(--text-dim);
  font-size: 0.8rem;
}

/* ── Prices ── */
.price-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  text-align: center;
}
.price-card .amount { font-size: 2rem; font-weight: 700; color: var(--accent); }
.price-card .label  { color: var(--text-dim); font-size: 0.9rem; margin-top: 4px; }
.price-card.featured { border-color: var(--accent); }

/* ── Hamburger menu ── */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  flex-direction: column;
  gap: 5px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: .2s;
}

/* ── Responsive ── */
@media (max-width: 700px) {
  /* Header */
  header {
    flex-wrap: wrap;
    height: auto;
    padding: 12px 16px;
    gap: 0;
    position: relative;
  }
  header .logo { flex: 1; }

  .nav-toggle {
    display: flex;
    margin-left: auto;
  }

  header nav {
    display: none;
    flex-direction: column;
    width: 100%;
    padding: 8px 0 4px;
    gap: 0;
    border-top: 1px solid var(--border);
    margin-top: 10px;
  }
  header nav.open { display: flex; }

  header nav a {
    padding: 10px 4px;
    border-bottom: 1px solid var(--border);
    font-size: 1rem;
  }
  header nav a:last-child { border-bottom: none; }

  .nav-right {
    width: 100%;
    margin-left: 0;
    padding: 8px 0 4px;
    border-top: 1px solid var(--border);
    margin-top: 4px;
    display: none;
  }
  .nav-right.open { display: flex; }
  .nav-right .btn { width: 100%; text-align: center; }

  /* Main */
  main { padding: 20px 14px; }

  /* Hero */
  .hero { padding: 32px 0 24px; }
  .hero h1 { font-size: 1.7rem; }
  .hero p { font-size: 1rem; }

  /* Grid */
  .grid-3 { grid-template-columns: 1fr 1fr; gap: 10px; }
  .price-card[style*="span 2"] { grid-column: span 2; }

  /* Cards */
  .card { padding: 16px; }

  /* Tables : scroll horizontal */
  .table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  table { min-width: 480px; }
  th, td { padding: 8px 10px; font-size: 0.8rem; }

  /* Buttons */
  .btn { padding: 10px 14px; font-size: 0.9rem; }

  /* Code */
  pre { font-size: 0.78rem; }
}

@media (max-width: 400px) {
  .grid-3 { grid-template-columns: 1fr; }
  .price-card[style*="span 2"] { grid-column: span 1; }
  .hero h1 { font-size: 1.4rem; }
}