/* Ledger Cold Wallet - Color palette */
:root {
  --color1: #20dbd1;
  --color2: #68e4a5;
  --color3: #940a08;
  --color4: #b0460c;
  --color5: #bf9822;
  --dark: #0d1117;
  --dark2: #161b22;
  --light: #f0f6fc;
  --text: #c9d1d9;
  --text-muted: #8b949e;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--dark);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.site-header {
  background: linear-gradient(135deg, var(--dark2) 0%, var(--dark) 100%);
  border-bottom: 1px solid rgba(32, 219, 209, 0.2);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo a {
  color: var(--color1);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.25rem;
}

.nav-main ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
}

.nav-main a {
  color: var(--text);
  text-decoration: none;
  padding: 0.35rem 0.5rem;
  border-radius: 6px;
  transition: color 0.2s, background 0.2s;
}

.nav-main a:hover {
  color: var(--color1);
  background: rgba(32, 219, 209, 0.1);
}

.lang-switcher {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.lang-switcher a {
  color: var(--color2);
  text-decoration: none;
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  border: 1px solid rgba(104, 228, 165, 0.3);
  font-size: 0.9rem;
  transition: background 0.2s, border-color 0.2s;
}

.lang-switcher a:hover,
.lang-switcher a.active {
  background: rgba(104, 228, 165, 0.15);
  border-color: var(--color2);
}

/* Main content */
main {
  flex: 1;
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
  width: 100%;
}

.hero-block {
  background: linear-gradient(145deg, rgba(32, 219, 209, 0.08) 0%, rgba(104, 228, 165, 0.05) 50%, rgba(191, 152, 34, 0.05) 100%);
  border: 1px solid rgba(32, 219, 209, 0.15);
  border-radius: 16px;
  padding: 2rem;
  margin-bottom: 2.5rem;
}

.hero-block h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.5rem, 4vw, 2rem);
  color: var(--light);
  line-height: 1.3;
}

.hero-block p {
  margin: 0;
  color: var(--text);
  font-size: 1.05rem;
}

h1 { color: var(--light); font-size: clamp(1.5rem, 4vw, 2rem); margin: 0 0 1rem; }
h2 {
  color: var(--color1);
  font-size: 1.35rem;
  margin: 2.5rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(32, 219, 209, 0.25);
}
h3 {
  color: var(--color2);
  font-size: 1.15rem;
  margin: 1.5rem 0 0.75rem;
}

p {
  margin: 0 0 1rem;
  color: var(--text);
}

a {
  color: var(--color1);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Content blocks */
.content-block {
  margin-bottom: 2rem;
}

.content-block--accent {
  background: rgba(176, 70, 12, 0.08);
  border-left: 4px solid var(--color4);
  padding: 1.25rem 1.5rem;
  border-radius: 0 12px 12px 0;
}

.content-block--tip {
  background: rgba(104, 228, 165, 0.08);
  border-left: 4px solid var(--color2);
  padding: 1.25rem 1.5rem;
  border-radius: 0 12px 12px 0;
}

/* Tables */
.table-wrap {
  overflow-x: auto;
  margin: 1rem 0;
  border-radius: 12px;
  border: 1px solid rgba(32, 219, 209, 0.2);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

th, td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

th {
  background: rgba(32, 219, 209, 0.12);
  color: var(--color1);
  font-weight: 600;
}

tr:hover td {
  background: rgba(255,255,255,0.02);
}

/* Images */
.content-img {
  max-width: 100%;
  width: 100%;
  max-height: 320px;
  object-fit: contain;
  border-radius: 12px;
  margin: 1rem 0;
  border: 1px solid rgba(32, 219, 209, 0.15);
  background: var(--dark2);
}

/* Lists */
ul, ol {
  margin: 0 0 1rem;
  padding-left: 1.5rem;
}

li { margin-bottom: 0.35rem; }

/* FAQ */
.faq-list {
  margin: 1.5rem 0;
}

.faq-item {
  border: 1px solid rgba(32, 219, 209, 0.2);
  border-radius: 10px;
  margin-bottom: 0.75rem;
  overflow: hidden;
}

.faq-q {
  width: 100%;
  padding: 1rem 1.25rem;
  background: rgba(32, 219, 209, 0.06);
  border: none;
  color: var(--color1);
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
}

.faq-q:hover {
  background: rgba(32, 219, 209, 0.12);
}

.faq-q::after {
  content: '+';
  font-size: 1.25rem;
  color: var(--color2);
  flex-shrink: 0;
}

.faq-item.is-open .faq-q::after {
  content: '−';
}

.faq-a {
  padding: 0 1.25rem 1rem;
  color: var(--text);
  display: none;
}

.faq-item.is-open .faq-a {
  display: block;
}

/* Footer */
.site-footer {
  background: var(--dark2);
  border-top: 1px solid rgba(32, 219, 209, 0.15);
  padding: 2rem 1.5rem;
  margin-top: auto;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-nav {
  margin-bottom: 1.5rem;
}

.footer-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
}

.footer-nav a {
  color: var(--text-muted);
  text-decoration: none;
}

.footer-nav a:hover {
  color: var(--color1);
}

.footer-lang {
  margin-bottom: 1rem;
}

.footer-lang a {
  color: var(--color2);
  text-decoration: none;
  margin-right: 1rem;
}

.footer-lang a:hover {
  text-decoration: underline;
}

.footer-copy {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 0;
}

/* Utility */
.color1 { color: var(--color1); }
.color2 { color: var(--color2); }
.color3 { color: var(--color3); }
.color4 { color: var(--color4); }
.color5 { color: var(--color5); }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

/* Mobile */
@media (max-width: 768px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav-main ul {
    flex-direction: column;
    gap: 0.25rem;
  }

  main {
    padding: 1.5rem 1rem 2rem;
  }

  .hero-block {
    padding: 1.5rem;
  }

  th, td {
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
  }
}

@media (max-width: 480px) {
  body { font-size: 15px; }
  .lang-switcher a { padding: 0.3rem 0.5rem; font-size: 0.85rem; }
}