/* ===== Design tokens ===== */
:root {
  /* Markenfarben, exakt aus dem Bitcoin21st-Logo entnommen */
  --color-navy-900: #082151;
  --color-navy-800: #0f2f6b;
  --color-navy-700: #173d84;
  --color-gold-500: #ffd700;
  --color-gold-400: #ffe046;
  --color-gold-700: #b89600;
  --color-cyan-500: #00efff;
  --color-gray-900: #16181d;
  --color-gray-700: #3f4552;
  --color-gray-500: #6b7280;
  --color-gray-300: #d1d5db;
  --color-gray-100: #f4f5f7;
  --color-white: #ffffff;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;

  --max-width: 1140px;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(11, 15, 43, 0.08), 0 1px 2px rgba(11, 15, 43, 0.06);
  --shadow-lg: 0 10px 25px rgba(11, 15, 43, 0.12);

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4.5rem;
}

* { box-sizing: border-box; }
/* scroll-behavior: smooth removed - it breaks the initial jump to a #fragment on page load */
.vgl-section, .toc { scroll-margin-top: 90px; }

.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
  background: var(--color-navy-900);
  color: var(--color-white);
  padding: 0.75rem 1.25rem;
  border-radius: 0 0 8px 0;
  z-index: 100;
  font-weight: 700;
}
.skip-link:focus {
  left: 0;
  top: 0;
}

.breadcrumbs {
  font-size: 0.85rem;
  color: var(--color-gray-500);
  padding: var(--space-2) 0 0;
}
.breadcrumbs a { color: var(--color-gray-500); }
.breadcrumbs a:hover { color: var(--color-navy-900); }
.breadcrumbs .sep { margin: 0 0.4rem; }
.breadcrumbs .current { color: var(--color-gray-700); }
body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-gray-900);
  background: var(--color-white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-navy-700); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

h1, h2, h3, h4 {
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--color-navy-900);
  margin: 0 0 var(--space-2);
}
h1 { font-size: clamp(2.2rem, 4.2vw, 3.4rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.5rem, 2.6vw, 2.1rem); margin-top: var(--space-5); }
h3 { font-size: 1.2rem; font-weight: 700; margin-top: var(--space-4); }
p { margin: 0 0 var(--space-2); }
ul, ol { margin: 0 0 var(--space-2); padding-left: 1.4rem; }

/* ===== Top disclaimer bar ===== */
.disclaimer-bar {
  background: var(--color-navy-900);
  color: var(--color-gray-300);
  font-size: 0.85rem;
  padding: var(--space-1) 0;
  text-align: center;
}
.disclaimer-bar a { color: var(--color-gold-400); }

/* ===== Header ===== */
.site-header {
  border-bottom: 1px solid var(--color-gray-300);
  background: var(--color-white);
  position: sticky;
  top: 0;
  z-index: 50;
}
.site-header__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) 0;
  gap: var(--space-3);
}
.site-logo {
  display: flex;
  align-items: center;
  white-space: nowrap;
}
.site-logo img { display: block; height: 40px; width: auto; }

.main-nav { display: flex; align-items: center; gap: var(--space-3); flex-wrap: wrap; }
.main-nav a {
  color: var(--color-gray-700);
  font-weight: 600;
  font-size: 0.95rem;
}
.main-nav a:hover { color: var(--color-navy-900); text-decoration: none; }

.header-right { display: flex; align-items: center; gap: var(--space-2); }

.btc-price {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-navy-900);
  background: var(--color-gray-100);
  padding: 0.3rem 0.65rem;
  border-radius: 999px;
  white-space: nowrap;
}
.btc-price__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-gold-500);
  display: inline-block;
  animation: btc-pulse 2s ease-in-out infinite;
}
.btc-price.is-up .btc-price__change { color: #1a7a4c; }
.btc-price.is-down .btc-price__change { color: #b3401f; }
.btc-price__change { font-weight: 600; }

@media (max-width: 700px) {
  .main-nav { order: 3; flex: 1 1 100%; justify-content: center; padding-top: var(--space-1); gap: var(--space-2); }
  .btc-price { display: none; }
}
@keyframes btc-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.lang-switch { display: flex; gap: 0.5rem; font-size: 0.85rem; }
.lang-switch a {
  padding: 0.15rem 0.5rem;
  border-radius: 6px;
  color: var(--color-gray-500);
  font-weight: 600;
}
.lang-switch a.active { background: var(--color-gray-100); color: var(--color-navy-900); }

/* ===== Affiliate quick-links strip ===== */
.affiliate-strip {
  background: var(--color-navy-900);
  color: var(--color-white);
  padding: var(--space-5) 0;
}
.affiliate-strip__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
}
.affiliate-strip h3 {
  color: var(--color-gold-400);
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: 0 0 var(--space-2);
}
.affiliate-strip ul { list-style: none; padding: 0; margin: 0; }
.affiliate-strip li { margin-bottom: 0.55rem; }
.affiliate-strip a {
  color: var(--color-gray-300);
  font-size: 0.92rem;
}
.affiliate-strip a:hover { color: var(--color-white); text-decoration: underline; }

@media (max-width: 860px) {
  .affiliate-strip__grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 520px) {
  .affiliate-strip__grid { grid-template-columns: 1fr; }
}

/* ===== Hero ===== */
.hero {
  background:
    radial-gradient(ellipse 900px 500px at 15% -10%, rgba(255, 215, 0, 0.16), transparent 60%),
    radial-gradient(ellipse 900px 500px at 85% 110%, rgba(0, 239, 255, 0.14), transparent 60%),
    var(--color-white);
  color: var(--color-navy-900);
  padding: var(--space-6) 0;
  text-align: center;
}
.hero h1 { color: var(--color-navy-900); }
.hero p { color: var(--color-gray-700); font-size: 1.15rem; max-width: 640px; margin: 0 auto var(--space-3); }

/* ===== Trust bar (unter dem Hero) ===== */
.trust-bar { background: var(--color-gray-100); padding: var(--space-3) 0; }
.trust-bar__row {
  display: flex;
  justify-content: center;
  gap: var(--space-5);
  flex-wrap: wrap;
  text-align: center;
}
.trust-bar__item strong {
  display: block;
  color: var(--color-navy-900);
  font-size: 1.05rem;
}
.trust-bar__item span {
  color: var(--color-gray-500);
  font-size: 0.85rem;
}
.btn {
  display: inline-block;
  background: var(--color-gold-500);
  color: var(--color-navy-900);
  font-weight: 700;
  padding: 0.75rem 1.5rem;
  border-radius: 999px;
  transition: transform 0.15s ease, background 0.15s ease;
}
.btn:hover { background: var(--color-gold-400); text-decoration: none; transform: translateY(-1px); }

/* ===== Post cards / grid ===== */
.post-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
  margin: var(--space-4) 0;
}
@media (max-width: 900px) { .post-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .post-grid { grid-template-columns: 1fr; } }

.bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
  margin: var(--space-4) 0;
}
.bento-grid .post-card--featured { grid-column: span 2; }
.bento-grid .post-card--featured .post-card__image { aspect-ratio: 21/9; }
.bento-grid .post-card--featured h3 { font-size: 1.4rem; }
@media (max-width: 900px) {
  .bento-grid { grid-template-columns: repeat(2, 1fr); }
  .bento-grid .post-card--featured { grid-column: span 2; }
}
@media (max-width: 600px) {
  .bento-grid { grid-template-columns: 1fr; }
  .bento-grid .post-card--featured { grid-column: span 1; }
}

.post-card {
  position: relative;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--color-white);
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}
.post-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.post-card__image { aspect-ratio: 16/9; background: var(--color-gray-100); overflow: hidden; }
.post-card__image img { width: 100%; height: 100%; object-fit: cover; }
.post-card__body { padding: var(--space-2) var(--space-2) var(--space-3); flex: 1; display: flex; flex-direction: column; }
.post-card__category {
  text-transform: uppercase;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-navy-700);
  margin-bottom: 0.4rem;
}
.post-card h3 { margin-top: 0; font-size: 1.05rem; }
.post-card a.stretched { color: inherit; text-decoration: none; }
.post-card a.stretched::after { content: ""; position: absolute; inset: 0; z-index: 1; }
.post-card__excerpt { color: var(--color-gray-500); font-size: 0.92rem; flex: 1; }
.post-card__meta { color: var(--color-gray-500); font-size: 0.8rem; margin-top: var(--space-1); }

/* ===== Category hub sections ===== */
.section { padding: var(--space-5) 0; }
.section--alt { background: var(--color-gray-100); }
.section-heading { text-align: center; margin-bottom: var(--space-4); }
.section-heading p { color: var(--color-gray-500); max-width: 620px; margin: 0 auto; }

.provider-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  align-items: start;
}
@media (max-width: 760px) { .provider-grid { grid-template-columns: 1fr; } }

.provider-card {
  border: 1px solid var(--color-gray-300);
  border-radius: 12px;
  padding: var(--space-4);
  background: var(--color-white);
  box-shadow: var(--shadow);
}
.provider-card__name {
  display: block;
  text-align: center;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-navy-900);
  padding-bottom: var(--space-3);
  margin-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-gray-100);
}
.provider-card__name:hover { color: var(--color-navy-700); text-decoration: none; }
.provider-card__proscons { display: flex; flex-direction: column; gap: var(--space-3); font-size: 0.9rem; }
.provider-card__pros strong { color: #1a7a4c; }
.provider-card__cons strong { color: #b3401f; }
.provider-card__proscons ul { list-style: none; padding: 0; margin: 0.5rem 0 0; }
.provider-card__proscons li { padding-left: 1.5rem; position: relative; margin-bottom: 0.5rem; color: var(--color-gray-700); line-height: 1.4; }
.provider-card__pros li::before { content: "✓"; position: absolute; left: 0; top: 0; color: #1a7a4c; font-weight: 700; }
.provider-card__cons li::before { content: "✕"; position: absolute; left: 0; top: 0; color: #b3401f; font-weight: 700; font-size: 0.85em; }

.cta-row { display: flex; justify-content: flex-end; margin-top: var(--space-3); }
.btn--dark { background: var(--color-navy-900); color: var(--color-white); }
.btn--dark:hover { background: var(--color-navy-700); }

/* ===== Article ===== */
.article-header { padding: var(--space-5) 0 var(--space-3); border-bottom: 1px solid var(--color-gray-300); }
.article-meta { color: var(--color-gray-500); font-size: 0.9rem; }
.article-body { max-width: 760px; margin: var(--space-4) auto 0; }
.article-body img { border-radius: var(--radius); margin: var(--space-2) 0; }
.article-body table { border-collapse: collapse; width: 100%; margin: var(--space-2) 0; font-size: 0.92rem; }
.article-body th, .article-body td { border: 1px solid var(--color-gray-300); padding: 0.5rem 0.7rem; text-align: left; }
.article-body th { background: var(--color-gray-100); }
.article-body blockquote {
  border-left: 3px solid var(--color-gold-500);
  margin: var(--space-2) 0;
  padding: 0.25rem var(--space-2);
  color: var(--color-gray-700);
}

.toc {
  background: var(--color-gray-100);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius);
  padding: var(--space-2) var(--space-3);
  max-width: 760px;
  margin: var(--space-3) auto 0;
}
.toc summary { font-weight: 700; cursor: pointer; color: var(--color-navy-900); }
.toc ul { margin-top: var(--space-1); }
.toc a { color: var(--color-gray-700); }

/* ===== Footer ===== */
.site-footer {
  background: var(--color-navy-900);
  color: var(--color-gray-300);
  padding: var(--space-5) 0 var(--space-3);
  margin-top: var(--space-6);
  font-size: 0.9rem;
}
.site-footer a { color: var(--color-gray-300); }
.site-footer a:hover { color: var(--color-white); }
.footer-grid { display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--space-3); margin-bottom: var(--space-3); }
.footer-legal { border-top: 1px solid var(--color-navy-700); padding-top: var(--space-2); display: flex; gap: var(--space-3); flex-wrap: wrap; font-size: 0.82rem; color: var(--color-gray-500); }

/* ===== Vergleichstest (bewusst eigenständiges Layout) ===== */
.vgl-intro {
  background: #fbf6ec;
  border-bottom: 3px solid var(--color-gold-500);
  padding: var(--space-6) 0 var(--space-5);
  text-align: center;
}
.vgl-eyebrow {
  display: inline-block;
  background: var(--color-navy-900);
  color: var(--color-gold-400);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.3rem 0.9rem;
  border-radius: 999px;
  margin-bottom: var(--space-2);
}
.vgl-intro h1 { max-width: 720px; margin: 0 auto var(--space-2); }
.vgl-intro p { color: var(--color-gray-700); max-width: 620px; margin: 0 auto; font-size: 1.05rem; }

.vgl-section { padding: var(--space-6) 0; background: #fff; }
.vgl-section--alt { background: #fbf6ec; }
.vgl-section__head {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
  max-width: 760px;
  margin: 0 auto var(--space-4);
}
.vgl-step {
  font-family: Georgia, 'Times New Roman', serif;
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--color-gold-700);
  line-height: 1;
}
.vgl-section__head h2 { margin-top: 0; }
.vgl-section__head p { color: var(--color-gray-700); margin: 0; }

.vgl-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
  align-items: stretch;
}
@media (max-width: 860px) { .vgl-cards { grid-template-columns: 1fr; } }

.vgl-card {
  position: relative;
  background: #fff;
  border: 1px solid var(--color-gray-300);
  border-radius: 14px;
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
}
.vgl-card--top { border: 2px solid var(--color-gold-500); box-shadow: var(--shadow-lg); }
.vgl-badge {
  position: absolute;
  top: -13px;
  left: var(--space-3);
  background: var(--color-gold-500);
  color: var(--color-navy-900);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
}
.vgl-card h3 { margin: var(--space-1) 0 var(--space-2); text-align: center; }
.vgl-card__proscons { display: flex; flex-direction: column; gap: var(--space-3); font-size: 0.9rem; flex: 1; }
.vgl-card__proscons strong { display: block; margin-bottom: 0.4rem; }
.vgl-card__pros strong { color: #1a7a4c; }
.vgl-card__cons strong { color: #b3401f; }
.vgl-card__proscons ul { list-style: none; padding: 0; margin: 0; }
.vgl-card__proscons li { padding-left: 1.4rem; position: relative; margin-bottom: 0.4rem; color: var(--color-gray-700); line-height: 1.4; }
.vgl-card__pros li::before { content: "✓"; position: absolute; left: 0; top: 0; color: #1a7a4c; font-weight: 700; }
.vgl-card__cons li::before { content: "✕"; position: absolute; left: 0; top: 0; color: #b3401f; font-weight: 700; font-size: 0.85em; }
.vgl-card__link {
  display: block;
  text-align: center;
  margin-top: var(--space-3);
  font-weight: 700;
  color: var(--color-navy-900);
  border-top: 1px solid var(--color-gray-100);
  padding-top: var(--space-2);
}