/* Advanced Crypto Ledger Usage - Theme */
:root {
  --color1: #5c1014;
  --color2: #914707;
  --color3: #918fff;
  --color4: #e8caff;
  --color5: #ffffff;
  --bg-dark: #1a0a0c;
  --bg-card: #2d1518;
  --bg-section: #250e12;
  --text: #f5f0f5;
  --text-muted: #c9b8cc;
  --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-size-base: 16px;
  --max-width: 960px;
  --radius: 12px;
  --radius-lg: 20px;
}

* {
  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);
  background: var(--bg-dark);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Header */
.site-header {
  background: linear-gradient(135deg, var(--color1) 0%, var(--color2) 50%, #6b2a0a 100%);
  padding: 1rem 1.5rem;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 4px 20px rgba(92, 16, 20, 0.5);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-logo {
  color: var(--color4);
  font-weight: 700;
  font-size: 1.15rem;
  text-decoration: none;
  letter-spacing: 0.02em;
}

.site-logo:hover {
  color: var(--color5);
}

.nav-main {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
}

.nav-main a {
  color: rgba(255,255,255,0.95);
  text-decoration: none;
  font-weight: 500;
  padding: 0.35rem 0.6rem;
  border-radius: 8px;
  font-size: 0.95rem;
}

.nav-main a:hover {
  background: rgba(232, 202, 255, 0.2);
  color: var(--color4);
}

.lang-switcher {
  display: flex;
  gap: 0.35rem;
}

.lang-switcher a {
  color: rgba(255,255,255,0.9);
  text-decoration: none;
  font-weight: 600;
  padding: 0.35rem 0.65rem;
  border-radius: 8px;
  font-size: 0.9rem;
}

.lang-switcher a:hover {
  background: var(--color4);
  color: var(--color1);
}

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

/* Hero */
.hero-block {
  background: linear-gradient(160deg, var(--color1) 0%, var(--bg-card) 40%, var(--color2) 100%);
  padding: 3rem 1.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-block::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 20% 80%, rgba(145, 143, 255, 0.15) 0%, transparent 50%);
  pointer-events: none;
}

.hero-block h1 {
  margin: 0;
  font-size: clamp(1.5rem, 4vw, 2rem);
  color: var(--color5);
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  position: relative;
  line-height: 1.3;
}

/* Main content */
.main-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
}

.content-block {
  margin-bottom: 2.5rem;
  padding: 1.75rem;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(145, 143, 255, 0.15);
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

.content-block.intro-block {
  background: linear-gradient(145deg, var(--bg-card) 0%, var(--bg-section) 100%);
  border-color: rgba(232, 202, 255, 0.12);
}

.content-block h2 {
  margin: 0 0 1rem;
  color: var(--color4);
  font-size: 1.5rem;
  border-bottom: 2px solid var(--color3);
  padding-bottom: 0.5rem;
}

.content-block h3 {
  margin: 1.25rem 0 0.75rem;
  color: var(--color3);
  font-size: 1.2rem;
}

.content-block p {
  margin: 0 0 1rem;
}

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

.content-block ul {
  margin: 0.75rem 0 1rem;
  padding-left: 1.5rem;
}

.content-block li {
  margin-bottom: 0.4rem;
}

.content-block img {
  width: 100%;
  max-width: 520px;
  height: auto;
  display: block;
  margin: 1rem 0 1.25rem;
  border-radius: var(--radius);
  border: 1px solid rgba(145, 143, 255, 0.2);
  box-shadow: 0 4px 12px rgba(0,0,0,0.25);
}

/* Tables */
.content-block table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.95rem;
  background: rgba(0,0,0,0.2);
  border-radius: var(--radius);
  overflow: hidden;
}

.content-block th,
.content-block td {
  padding: 0.65rem 0.85rem;
  text-align: left;
  border-bottom: 1px solid rgba(232, 202, 255, 0.1);
}

.content-block th {
  background: var(--color1);
  color: var(--color4);
  font-weight: 600;
}

.content-block tr:hover td {
  background: rgba(145, 143, 255, 0.06);
}

/* Warning box */
.warning-box {
  background: rgba(92, 16, 20, 0.4);
  border-left: 4px solid var(--color2);
  padding: 1rem 1.25rem;
  margin: 1.25rem 0;
  border-radius: 0 var(--radius) var(--radius) 0;
}

.warning-box strong {
  color: var(--color4);
}

/* FAQ */
.faq-block {
  margin-top: 2rem;
}

.faq-block h2 {
  color: var(--color4);
  margin-bottom: 1.25rem;
  border-bottom: 2px solid var(--color3);
  padding-bottom: 0.5rem;
}

.faq-item {
  margin-bottom: 0.5rem;
  border: 1px solid rgba(145, 143, 255, 0.2);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-card);
}

.faq-item summary {
  padding: 1rem 1.25rem;
  cursor: pointer;
  font-weight: 600;
  color: var(--color4);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

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

.faq-item summary::after {
  content: '+';
  font-size: 1.25rem;
  color: var(--color3);
  flex-shrink: 0;
}

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

.faq-item .faq-answer {
  padding: 0 1.25rem 1rem;
  color: var(--text-muted);
  border-top: 1px solid rgba(145, 143, 255, 0.1);
}

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

.faq-item .faq-answer p:first-child {
  margin-top: 0.75rem;
}

/* Links in content */
.content-block a {
  color: var(--color3);
  text-decoration: underline;
}

.content-block a:hover {
  color: var(--color4);
}

/* Footer */
.site-footer {
  background: linear-gradient(180deg, var(--bg-section) 0%, var(--color1) 100%);
  padding: 2.5rem 1.5rem 2rem;
  margin-top: 2rem;
  border-top: 1px solid rgba(145, 143, 255, 0.2);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  justify-content: space-between;
  align-items: flex-start;
}

.footer-nav h3 {
  margin: 0 0 0.75rem;
  color: var(--color4);
  font-size: 1rem;
}

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

.footer-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
}

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

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

.footer-lang a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
}

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

.footer-copy {
  width: 100%;
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(232, 202, 255, 0.1);
  color: var(--text-muted);
  font-size: 0.9rem;
  text-align: center;
}

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

  .nav-main {
    order: 3;
    width: 100%;
  }

  .content-block {
    padding: 1.25rem;
  }

  .content-block th,
  .content-block td {
    display: block;
    padding: 0.5rem 0.75rem;
  }

  .content-block th {
    border-bottom: none;
    padding-top: 0.75rem;
  }

  .content-block td {
    padding-bottom: 0.75rem;
  }

  .content-block td::before {
    content: attr(data-label);
    font-weight: 600;
    color: var(--color3);
    display: inline-block;
    margin-right: 0.5rem;
  }

  .content-block tr {
    display: block;
    margin-bottom: 1rem;
    border: 1px solid rgba(145, 143, 255, 0.15);
    border-radius: var(--radius);
    overflow: hidden;
  }

  .footer-inner {
    flex-direction: column;
    gap: 1.5rem;
  }
}

@media (max-width: 480px) {
  body {
    font-size: 16px;
  }

  .hero-block {
    padding: 2rem 1rem;
  }

  .main-content {
    padding: 1.5rem 1rem 2rem;
  }
}