/* Ledger Cold Wallet Purchase - Main Styles */
:root {
  --color1: #002a57;
  --color2: #0053ae;
  --color3: #00b3ff;
  --color4: #00f4db;
  --color5: #ffffb9;
  --bg-dark: #001a35;
  --bg-card: rgba(0, 42, 87, 0.06);
  --text: #1a1a2e;
  --text-muted: #4a5568;
  --white: #fff;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0, 42, 87, 0.12);
  --shadow-hover: 0 12px 40px rgba(0, 83, 174, 0.18);
}

* {
  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: linear-gradient(180deg, var(--white) 0%, #f0f9ff 100%);
  min-height: 100vh;
}

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

a {
  color: var(--color2);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--color3);
}

/* Header */
.site-header {
  background: linear-gradient(135deg, var(--color1) 0%, var(--color2) 100%);
  color: var(--white);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--white);
}

.logo a {
  color: var(--white);
}

.nav-main {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5rem;
}

.nav-main a {
  color: rgba(255,255,255,0.95);
  font-weight: 500;
}

.nav-main a:hover {
  color: var(--color4);
}

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

.lang-switcher a {
  padding: 0.35rem 0.6rem;
  border-radius: 6px;
  background: rgba(255,255,255,0.15);
  color: var(--white);
  font-size: 0.9rem;
}

.lang-switcher a:hover,
.lang-switcher a.active {
  background: rgba(255,255,255,0.3);
}

/* Main content */
.main-content {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 20px 3rem;
}

.hero-block {
  background: linear-gradient(145deg, var(--color1) 0%, var(--color2) 80%);
  color: var(--white);
  padding: 2.5rem;
  border-radius: var(--radius-lg);
  margin-bottom: 2.5rem;
  box-shadow: var(--shadow);
}

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

.section-block {
  margin-bottom: 2.5rem;
}

.section-block h2 {
  color: var(--color1);
  font-size: 1.5rem;
  margin: 0 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color3);
}

.section-block h3 {
  color: var(--color2);
  font-size: 1.2rem;
  margin: 1.25rem 0 0.5rem;
}

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

.card-block {
  background: var(--bg-card);
  border: 1px solid rgba(0, 83, 174, 0.15);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin: 1rem 0;
  box-shadow: var(--shadow);
}

.table-wrap {
  overflow-x: auto;
  margin: 1rem 0;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

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

th, td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid rgba(0, 42, 87, 0.1);
}

th {
  background: var(--color1);
  color: var(--white);
  font-weight: 600;
}

tr:nth-child(even) {
  background: rgba(0, 244, 219, 0.06);
}

tr:hover {
  background: rgba(0, 179, 255, 0.08);
}

/* Image blocks - not too large */
.content-img {
  max-width: 420px;
  margin: 1rem 0;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

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

/* FAQ */
.faq-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.faq-item {
  border: 1px solid rgba(0, 83, 174, 0.2);
  border-radius: var(--radius);
  margin-bottom: 0.75rem;
  overflow: hidden;
  background: var(--white);
  box-shadow: 0 2px 8px rgba(0, 42, 87, 0.06);
}

.faq-q {
  margin: 0;
  padding: 1rem 1.25rem;
  font-weight: 600;
  color: var(--color1);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  font-size: 1rem;
}

.faq-q:hover {
  background: rgba(0, 244, 219, 0.1);
}

.faq-q::after {
  content: '+';
  font-size: 1.25rem;
  color: var(--color2);
  flex-shrink: 0;
  transition: transform 0.25s;
}

.faq-item.is-open .faq-q::after {
  transform: rotate(45deg);
}

.faq-a {
  padding: 0 1.25rem 1rem;
  margin: 0;
  color: var(--text);
  border-top: 1px solid rgba(0, 83, 174, 0.1);
}

.faq-a-inner {
  padding-top: 0.75rem;
}

.faq-item .faq-a {
  display: none;
}

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

/* Footer */
.site-footer {
  background: linear-gradient(180deg, var(--color1) 0%, var(--bg-dark) 100%);
  color: var(--white);
  padding: 2rem 20px;
  margin-top: 3rem;
}

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

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 2rem;
  margin-bottom: 1.5rem;
}

.footer-nav a {
  color: var(--color4);
}

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

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

.footer-lang a {
  color: rgba(255,255,255,0.85);
  margin-right: 1rem;
}

.footer-lang a:hover {
  color: var(--color4);
}

.copyright {
  font-size: 0.9rem;
  opacity: 0.9;
}

/* Internal links in content */
.content-links {
  margin: 1.5rem 0;
  padding: 1rem;
  background: rgba(0, 244, 219, 0.1);
  border-radius: var(--radius);
  border-left: 4px solid var(--color3);
}

.content-links p {
  margin: 0 0 0.5rem;
}

/* Utility */
.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: 768px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }
  .nav-main {
    flex-direction: column;
    align-items: flex-start;
  }
  .hero-block {
    padding: 1.5rem;
  }
  .main-content {
    padding: 1.5rem 16px 2rem;
  }
  body {
    font-size: 16px;
  }
}

@media (max-width: 480px) {
  th, td {
    padding: 0.5rem 0.6rem;
    font-size: 0.85rem;
  }
}