/* Ledger Cold Wallet - Modern multi-language site */
:root {
  --color1: #ffce70;
  --color2: #fff36c;
  --color3: #034cf5;
  --color4: #08bcff;
  --color5: #35fff8;
  --dark: #0a0e1a;
  --darker: #060912;
  --light: #e8ecf7;
  --text: #e2e6f0;
  --text-muted: #a8b4c8;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 8px 32px rgba(3, 76, 245, 0.12);
  --shadow-lg: 0 20px 60px rgba(3, 76, 245, 0.15);
  --transition: 0.25s ease;
}

* {
  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: 1.65;
  color: var(--text);
  background: var(--darker);
  min-height: 100vh;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color4);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color5);
}

/* Layout */
.site-wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.site-header {
  background: linear-gradient(135deg, var(--darker) 0%, rgba(3, 76, 245, 0.08) 100%);
  border-bottom: 1px solid rgba(8, 188, 255, 0.2);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}

.site-header .site-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.logo {
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--color5);
}

.logo a {
  color: inherit;
}

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

.main-nav a {
  color: var(--text);
  font-weight: 500;
  padding: 0.35rem 0.5rem;
  border-radius: 8px;
}

.main-nav a:hover {
  color: var(--color2);
  background: rgba(255, 243, 108, 0.1);
}

/* Language switcher */
.lang-switcher {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.lang-switcher a {
  padding: 0.4rem 0.75rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  background: rgba(8, 188, 255, 0.15);
  color: var(--color4);
}

.lang-switcher a:hover,
.lang-switcher a.active {
  background: var(--color3);
  color: var(--color5);
}

/* Hero / Page title block */
.hero-block {
  padding: 3rem 0;
  background: linear-gradient(180deg, rgba(3, 76, 245, 0.12) 0%, transparent 70%);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  margin-bottom: 2rem;
}

.hero-block h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  color: var(--color5);
  font-weight: 800;
  line-height: 1.2;
}

.hero-block .lead {
  margin: 0;
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 720px;
}

/* Content blocks */
.content-block {
  padding: 2rem 0;
}

.content-block:nth-child(even) {
  background: rgba(8, 188, 255, 0.04);
  border-radius: var(--radius-lg);
  margin: 0 -20px;
  padding-left: 20px;
  padding-right: 20px;
}

.section-title {
  font-size: 1.5rem;
  color: var(--color4);
  margin: 0 0 1rem;
  font-weight: 700;
}

.section-title.sub {
  font-size: 1.2rem;
  color: var(--color2);
  margin-top: 1.5rem;
}

.content-block p {
  margin: 0 0 1rem;
  color: var(--light);
}

.content-block p:last-child {
  margin-bottom: 0;
}

/* Images in content */
.content-img-wrap {
  margin: 1.5rem 0;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  max-width: 560px;
}

.content-img-wrap img {
  width: 100%;
  height: auto;
  vertical-align: middle;
}

/* Tables */
.table-wrap {
  overflow-x: auto;
  margin: 1.5rem 0;
  border-radius: var(--radius);
  border: 1px solid rgba(8, 188, 255, 0.25);
}

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

th, td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid rgba(8, 188, 255, 0.15);
}

th {
  background: rgba(3, 76, 245, 0.2);
  color: var(--color5);
  font-weight: 600;
}

tr:last-child td {
  border-bottom: none;
}

tbody tr:hover {
  background: rgba(8, 188, 255, 0.06);
}

/* FAQ */
.faq-block {
  padding: 2.5rem 0;
  background: linear-gradient(180deg, transparent, rgba(53, 255, 248, 0.06));
  border-radius: var(--radius-lg);
}

.faq-item {
  border: 1px solid rgba(8, 188, 255, 0.2);
  border-radius: var(--radius);
  margin-bottom: 0.75rem;
  overflow: hidden;
}

.faq-item summary {
  padding: 1rem 1.25rem;
  cursor: pointer;
  font-weight: 600;
  color: var(--color2);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  font-size: 1.25rem;
  color: var(--color4);
  flex-shrink: 0;
}

.faq-item[open] summary::after {
  content: '−';
}

.faq-item .faq-answer {
  padding: 0 1.25rem 1rem;
  color: var(--light);
  border-top: 1px solid rgba(8, 188, 255, 0.15);
}

.faq-item .faq-answer p {
  margin: 0.75rem 0 0;
}

/* Footer */
.site-footer {
  margin-top: 3rem;
  padding: 2rem 0;
  border-top: 1px solid rgba(8, 188, 255, 0.2);
  background: rgba(0,0,0,0.3);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
}

.footer-col h4 {
  margin: 0 0 1rem;
  font-size: 1rem;
  color: var(--color4);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-col li {
  margin-bottom: 0.5rem;
}

.footer-col a {
  color: var(--text-muted);
}

.footer-col a:hover {
  color: var(--color5);
}

.footer-bottom {
  padding-top: 1.5rem;
  border-top: 1px solid rgba(8, 188, 255, 0.15);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.footer-bottom .lang-switcher {
  margin-left: auto;
}

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

/* 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;
}

@media (max-width: 767px) {
  .site-header .site-wrap {
    flex-direction: column;
    align-items: flex-start;
  }
  .main-nav ul {
    flex-direction: column;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}