/* Bitcoin Ledger Backup – multi-page site styles */
:root {
  --color1: #ffa0df;
  --color2: #ffe694;
  --color3: #3f0b0e;
  --color4: #90827b;
  --color5: #fffaf2;
  --font-min: 16px;
  --max-width: 1200px;
  --gap: 1.5rem;
  --radius: 12px;
  --shadow: 0 4px 20px rgba(63, 11, 14, 0.08);
  --transition: 0.25s ease;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: var(--font-min);
  line-height: 1.6;
  color: var(--color3);
  background: var(--color5);
}

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

a {
  color: var(--color3);
  text-decoration: none;
  transition: color var(--transition);
}

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

/* Header */
.site-header {
  background: linear-gradient(135deg, var(--color3) 0%, #5a1a1e 100%);
  color: var(--color5);
  padding: 1rem var(--gap);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.site-header a {
  color: var(--color5);
}

.site-header a:hover {
  color: var(--color2);
}

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

.logo {
  font-weight: 700;
  font-size: 1.25rem;
}

.nav-menu {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

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

.lang-switcher a {
  padding: 0.35rem 0.6rem;
  border-radius: 6px;
  background: rgba(255,250,242,0.15);
  font-size: 0.9rem;
}

.lang-switcher a:hover {
  background: rgba(255,250,242,0.3);
}

/* Hero / page title block */
.hero {
  background: linear-gradient(180deg, var(--color4) 0%, var(--color3) 100%);
  color: var(--color5);
  padding: 2.5rem var(--gap);
  text-align: center;
}

.hero h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  font-weight: 700;
}

.hero p {
  margin: 0;
  opacity: 0.95;
  max-width: 60ch;
  margin-left: auto;
  margin-right: auto;
}

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

.content-block {
  margin-bottom: 3rem;
}

.content-block h2 {
  color: var(--color3);
  font-size: 1.5rem;
  margin: 0 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color2);
}

.content-block h3 {
  color: var(--color4);
  font-size: 1.2rem;
  margin: 1.25rem 0 0.5rem;
}

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

/* Cards / sections */
.card {
  background: #fff;
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow);
  border: 1px solid rgba(63,11,14,0.06);
}

.card h2, .card h3 {
  margin-top: 0;
}

/* Tables */
.table-wrap {
  overflow-x: auto;
  margin: 1rem 0;
}

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

th, td {
  padding: 0.6rem 0.8rem;
  text-align: left;
  border: 1px solid rgba(63,11,14,0.12);
}

th {
  background: var(--color3);
  color: var(--color5);
  font-weight: 600;
}

tr:nth-child(even) {
  background: rgba(255,230,148,0.15);
}

/* Images in content – not too large */
.content-block img,
.article-img {
  max-width: 420px;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  margin: 1rem 0;
  box-shadow: var(--shadow);
}

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

.faq-item {
  border: 1px solid rgba(63,11,14,0.12);
  border-radius: var(--radius);
  margin-bottom: 0.5rem;
  overflow: hidden;
  background: #fff;
}

.faq-question {
  width: 100%;
  padding: 1rem 1.25rem;
  text-align: left;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color3);
  background: rgba(255,230,148,0.2);
  border: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
}

.faq-question:hover {
  background: rgba(255,230,148,0.35);
}

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

.faq-item.is-open .faq-question::after {
  content: "−";
}

.faq-answer {
  padding: 0 1.25rem 1rem;
  display: none;
}

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

.faq-answer p {
  margin: 0;
}

/* Footer */
.site-footer {
  background: var(--color3);
  color: var(--color5);
  padding: 2rem var(--gap);
  margin-top: 3rem;
}

.site-footer a {
  color: var(--color2);
}

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

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

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

.footer-menu a {
  font-weight: 500;
}

.footer-copy {
  font-size: 0.9rem;
  opacity: 0.85;
}

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

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

  .nav-menu {
    flex-direction: column;
  }

  .hero {
    padding: 1.75rem 1rem;
  }

  .content-block img,
  .article-img {
    max-width: 100%;
  }
}

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

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