/* CryptoWalletGuide — main stylesheet */
:root {
  --bg: #0a0e1a;
  --bg-2: #0f1526;
  --card: #131a2e;
  --card-hover: #18213a;
  --border: #222c47;
  --text: #e6ebf5;
  --muted: #94a0bb;
  --accent: #22d3ee;
  --accent-2: #a78bfa;
  --good: #34d399;
  --warn: #fbbf24;
  --bad: #f87171;
  --radius: 14px;
  --maxw: 1180px;
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .6em; }
h1 { font-size: clamp(1.9rem, 4.5vw, 3rem); letter-spacing: -.02em; }
h2 { font-size: clamp(1.4rem, 3vw, 2rem); letter-spacing: -.01em; }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 16px; }
.muted { color: var(--muted); }
.grad {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* Skip link */
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 8px; background: var(--card); padding: 8px 12px; z-index: 100; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10, 14, 26, .88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.15rem; color: var(--text); }
.logo:hover { text-decoration: none; }
.logo svg { width: 30px; height: 30px; }
.nav-links { display: flex; gap: 4px; list-style: none; margin: 0; padding: 0; }
.nav-links a {
  display: block; padding: 8px 14px; border-radius: 10px; color: var(--muted); font-weight: 500;
}
.nav-links a:hover, .nav-links a.active { color: var(--text); background: var(--card); text-decoration: none; }
.nav-links a.active { color: var(--accent); }
.menu-btn {
  display: none; background: none; border: 1px solid var(--border); color: var(--text);
  border-radius: 10px; padding: 8px 10px; cursor: pointer;
}
@media (max-width: 860px) {
  .menu-btn { display: block; }
  .nav-links {
    display: none; position: absolute; top: 64px; left: 0; right: 0; flex-direction: column;
    background: var(--bg-2); border-bottom: 1px solid var(--border); padding: 8px 16px 16px;
  }
  .nav-links.open { display: flex; }
}

/* Hero */
.hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--border); }
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; opacity: .55; }
.hero-bg::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, var(--bg) 20%, rgba(10,14,26,.6) 60%, rgba(10,14,26,.2));
}
.hero-inner { position: relative; z-index: 1; padding: 90px 0 100px; max-width: 640px; }
.hero p.lead { font-size: 1.15rem; color: var(--muted); }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.btn {
  display: inline-block; padding: 12px 22px; border-radius: 12px; font-weight: 600;
  border: 1px solid var(--border); color: var(--text); background: var(--card);
}
.btn:hover { text-decoration: none; background: var(--card-hover); }
.btn.primary { background: linear-gradient(90deg, var(--accent), var(--accent-2)); color: #0a0e1a; border: 0; }
.btn.primary:hover { filter: brightness(1.1); }

/* Page header (inner pages) */
.page-head {
  padding: 56px 0 36px; border-bottom: 1px solid var(--border);
  background: radial-gradient(ellipse at top right, rgba(167,139,250,.14), transparent 60%),
              radial-gradient(ellipse at top left, rgba(34,211,238,.10), transparent 55%);
}
.page-head p { color: var(--muted); max-width: 760px; font-size: 1.08rem; }
.breadcrumbs { font-size: .9rem; color: var(--muted); margin-bottom: 12px; }
.breadcrumbs a { color: var(--muted); }

/* Sections */
section.block { padding: 56px 0; }
section.block + section.block { padding-top: 0; }
.section-title { display: flex; align-items: end; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 24px; }

/* Grids and cards */
.grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.grid-4 { display: grid; gap: 18px; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); }
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; transition: border-color .2s, transform .2s, background .2s;
}
.card:hover { border-color: #334066; background: var(--card-hover); }
a.card { display: block; color: var(--text); }
a.card:hover { text-decoration: none; transform: translateY(-2px); }
.card h3 { margin-bottom: .35em; }
.card p { color: var(--muted); font-size: .95rem; margin-bottom: .6em; }
.card .icon {
  width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center;
  background: rgba(34,211,238,.1); color: var(--accent); margin-bottom: 14px;
}
.card .icon svg { width: 24px; height: 24px; }

.item-head { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.badge-sym {
  flex: none; width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center;
  font-weight: 800; font-size: .78rem; color: #0a0e1a;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}
.item-head h3 { margin: 0; font-size: 1.08rem; }
.item-head .sub { font-size: .85rem; color: var(--muted); }

.tags { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0 10px; }
.tag {
  font-size: .75rem; padding: 3px 9px; border-radius: 999px;
  background: rgba(148,160,187,.12); color: var(--muted); border: 1px solid var(--border);
}
.tag.cyan { color: var(--accent); background: rgba(34,211,238,.08); border-color: rgba(34,211,238,.25); }
.tag.violet { color: var(--accent-2); background: rgba(167,139,250,.08); border-color: rgba(167,139,250,.25); }
.tag.green { color: var(--good); background: rgba(52,211,153,.08); border-color: rgba(52,211,153,.25); }
.tag.amber { color: var(--warn); background: rgba(251,191,36,.08); border-color: rgba(251,191,36,.25); }

dl.facts { display: grid; grid-template-columns: auto 1fr; gap: 4px 12px; font-size: .88rem; margin: 10px 0 0; }
dl.facts dt { color: var(--muted); }
dl.facts dd { margin: 0; }

.pc { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 12px; font-size: .88rem; }
.pc ul { margin: 0; padding-left: 18px; color: var(--muted); }
.pc strong { display: block; font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; margin-bottom: 4px; }
.pc .pros strong { color: var(--good); }
.pc .cons strong { color: var(--bad); }
@media (max-width: 420px) { .pc { grid-template-columns: 1fr; } }

/* Filters */
.toolbar { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-bottom: 24px; }
.search {
  flex: 1 1 240px; min-width: 0; padding: 11px 14px; border-radius: 12px;
  background: var(--card); border: 1px solid var(--border); color: var(--text); font-size: 1rem;
}
.search:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  padding: 8px 14px; border-radius: 999px; border: 1px solid var(--border); background: var(--card);
  color: var(--muted); cursor: pointer; font-size: .9rem; font-family: inherit;
}
.chip:hover { color: var(--text); }
.chip.active { color: #0a0e1a; background: var(--accent); border-color: var(--accent); font-weight: 600; }
.empty { display: none; padding: 30px; text-align: center; color: var(--muted); }
.count { color: var(--muted); font-size: .9rem; }

/* Article / prose */
.prose { max-width: 820px; }
.prose h2 { margin-top: 1.6em; }
.prose h3 { margin-top: 1.3em; }
.prose ul, .prose ol { padding-left: 22px; }
.prose li { margin-bottom: .4em; }
.prose p, .prose li { color: #c9d1e3; }

/* Tables */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; font-size: .93rem; min-width: 620px; }
th, td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { background: var(--bg-2); color: var(--muted); font-weight: 600; font-size: .82rem; text-transform: uppercase; letter-spacing: .05em; }
tr:last-child td { border-bottom: 0; }

/* Callout */
.callout {
  border: 1px solid rgba(251,191,36,.3); background: rgba(251,191,36,.06);
  border-radius: var(--radius); padding: 16px 18px; color: #e9dcb4; font-size: .95rem;
}
.callout strong { color: var(--warn); }

/* FAQ */
details.faq {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 16px 18px; margin-bottom: 10px;
}
details.faq summary { cursor: pointer; font-weight: 600; list-style: none; }
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::after { content: "+"; float: right; color: var(--accent); font-size: 1.2rem; line-height: 1; }
details.faq[open] summary::after { content: "−"; }
details.faq p { color: var(--muted); margin: 12px 0 0; }

/* Stats */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 14px; }
.stat { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; text-align: center; }
.stat b { display: block; font-size: 1.9rem; }
.stat span { color: var(--muted); font-size: .9rem; }

/* Ad slots */
.ad-slot { margin: 32px auto; text-align: center; min-height: 100px; }
.ad-slot:empty { display: none; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); background: var(--bg-2); padding: 44px 0 26px; margin-top: 40px; font-size: .92rem; }
.footer-grid { display: grid; gap: 28px; grid-template-columns: 2fr 1fr 1fr; }
@media (max-width: 720px) { .footer-grid { grid-template-columns: 1fr; } }
.site-footer h4 { margin: 0 0 10px; font-size: .95rem; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: 6px; }
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--text); }
.footer-bottom { border-top: 1px solid var(--border); margin-top: 28px; padding-top: 18px; color: var(--muted); font-size: .85rem; }

/* Cookie banner */
.cookie {
  position: fixed; left: 16px; right: 16px; bottom: 16px; z-index: 90; max-width: 560px;
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 18px; box-shadow: 0 10px 40px rgba(0,0,0,.5); display: none; font-size: .92rem;
}
.cookie.show { display: block; }
.cookie p { margin-bottom: 10px; color: var(--muted); }
.cookie .btn { padding: 8px 16px; font-size: .9rem; }

/* Back to top */
.to-top {
  position: fixed; right: 16px; bottom: 16px; width: 44px; height: 44px; border-radius: 50%;
  border: 1px solid var(--border); background: var(--card); color: var(--text); cursor: pointer;
  display: none; font-size: 1.1rem; z-index: 80;
}
.to-top.show { display: block; }