/* Crypto Ledger Analysis - Modern multi-language site */
:root {
  --color1: #0ffff8;
  --color2: #43fff8;
  --color3: #c4027c;
  --color4: #ff507d;
  --color5: #ffbd9f;
  --bg-dark: #0a0e17;
  --bg-card: #111827;
  --bg-card-hover: #1a2332;
  --text-primary: #f3f4f6;
  --text-muted: #9ca3af;
  --border-subtle: rgba(67, 255, 248, 0.15);
  --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-size-base: 16px;
  --max-content: 900px;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,0.25);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-dark);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

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

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

a:hover {
  color: var(--color1);
  text-decoration: underline;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  background: var(--color3);
  color: #fff;
  padding: 10px 16px;
  border-radius: var(--radius);
  z-index: 9999;
  transition: top 0.2s;
}
.skip-link:focus {
  top: 16px;
}

/* Header */
.site-header {
  background: linear-gradient(180deg, rgba(10,14,23,0.98) 0%, rgba(10,14,23,0.95) 100%);
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
}

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

.logo-link {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color1);
  text-decoration: none;
}
.logo-link:hover {
  text-decoration: none;
  color: var(--color2);
}

.nav-menu {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-menu a {
  color: var(--text-muted);
  padding: 0.4rem 0.6rem;
  border-radius: 6px;
  font-size: 0.95rem;
}
.nav-menu a:hover {
  color: var(--color2);
  background: rgba(67,255,248,0.08);
  text-decoration: none;
}

.lang-switcher {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.lang-switcher a {
  padding: 0.4rem 0.75rem;
  border-radius: 6px;
  font-size: 0.9rem;
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
}
.lang-switcher a:hover,
.lang-switcher a.active {
  color: var(--color1);
  border-color: var(--color2);
  background: rgba(67,255,248,0.08);
  text-decoration: none;
}

/* Main content */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
}

.content-block {
  max-width: var(--max-content);
  margin-left: auto;
  margin-right: auto;
}

/* Hero / page title block */
.hero-block {
  margin-bottom: 2.5rem;
  padding: 2rem 0;
  border-bottom: 1px solid var(--border-subtle);
}
.hero-block h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
}
.hero-block h1 .accent {
  color: var(--color2);
}

/* Section blocks */
.section-block {
  margin-bottom: 2.5rem;
}
.section-block h2 {
  font-size: 1.5rem;
  margin: 0 0 1rem;
  color: var(--color5);
  font-weight: 600;
}
.section-block h3 {
  font-size: 1.2rem;
  margin: 1.25rem 0 0.6rem;
  color: var(--color4);
  font-weight: 600;
}
.section-block p {
  margin: 0 0 1rem;
  color: var(--text-primary);
}
.section-block ul, .section-block ol {
  margin: 0 0 1rem;
  padding-left: 1.5rem;
}
.section-block li {
  margin-bottom: 0.4rem;
}

/* Card / highlight block */
.card-block {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin: 1.5rem 0;
  box-shadow: var(--shadow);
}
.card-block h3 {
  margin-top: 0;
}

/* Image block - not too large */
.img-block {
  margin: 1.5rem 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  max-width: 560px;
}
.img-block img {
  width: 100%;
  height: auto;
  vertical-align: middle;
  loading: lazy;
}

/* Tables */
.table-wrap {
  overflow-x: auto;
  margin: 1rem 0;
  border-radius: var(--radius);
  border: 1px solid var(--border-subtle);
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}
th, td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
}
th {
  background: rgba(196,2,124,0.15);
  color: var(--color4);
  font-weight: 600;
}
tr:last-child td {
  border-bottom: none;
}
tr:hover td {
  background: rgba(67,255,248,0.04);
}

/* FAQ block with script */
.faq-block {
  margin: 2rem 0;
}
.faq-block h2 {
  margin-bottom: 1rem;
}
.faq-item {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  margin-bottom: 0.5rem;
  overflow: hidden;
  background: var(--bg-card);
}
.faq-item summary {
  padding: 1rem 1.25rem;
  cursor: pointer;
  font-weight: 600;
  color: var(--color5);
  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(--color2);
  flex-shrink: 0;
}
.faq-item[open] summary::after {
  content: '−';
}
.faq-item .faq-answer {
  padding: 0 1.25rem 1rem;
  border-top: 1px solid var(--border-subtle);
}
.faq-item .faq-answer p {
  margin: 0.75rem 0 0;
  color: var(--text-muted);
  font-weight: 400;
}

/* Internal links in content */
.content-block a[href*=".html"] {
  color: var(--color4);
  font-weight: 500;
}
.content-block a[href*=".html"]:hover {
  color: var(--color5);
}

/* Footer */
.site-footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border-subtle);
  margin-top: 3rem;
  padding: 2rem 1.5rem;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}
.footer-nav h4 {
  font-size: 0.9rem;
  color: var(--color2);
  margin: 0 0 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.footer-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.footer-nav li {
  margin-bottom: 0.4rem;
}
.footer-nav a {
  color: var(--text-muted);
  font-size: 0.95rem;
}
.footer-nav a:hover {
  color: var(--color1);
  text-decoration: none;
}
.footer-bottom {
  max-width: 1200px;
  margin: 2rem auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.9rem;
  color: var(--text-muted);
}
.footer-lang {
  margin-top: 1rem;
}
.footer-lang a {
  color: var(--text-muted);
  margin-right: 0.75rem;
}
.footer-lang a:hover {
  color: var(--color2);
}

@media (min-width: 768px) {
  .footer-inner {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 767px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }
  .nav-menu {
    width: 100%;
  }
  main {
    padding: 1.5rem 1rem 2rem;
  }
  .hero-block {
    padding: 1.5rem 0;
  }
  th, td {
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
  }
}