/* ============================================================
   Bitrefill — informational site
   Design concept: the redemption ticket. Bitrefill turns crypto
   into a code you redeem somewhere else — gift card, top-up,
   bill receipt. Perforated ticket-stub cards, a barcode motif,
   and one accent per product category carry that idea through.
   ============================================================ */

:root {
  --bg:          #17132A;
  --bg-panel:    #211A3C;
  --bg-raised:   #2A2250;
  --line:        #3A3163;
  --line-soft:   #2B2450;

  --text:        #F4F1EA;
  --text-soft:   #B4ACD4;
  --text-faint:  #7A72A3;

  --brand:       #FF6E52;
  --brand-ink:   #FF8A73;

  --acc-lightning: #F5C518;
  --acc-mobile:    #2BC7A0;
  --acc-giftcard:  #FF6E52;
  --acc-bills:     #8C7CF6;

  --font-display: "Space Grotesk", "Segoe UI", sans-serif;
  --font-body:    "Work Sans", -apple-system, sans-serif;
  --font-mono:    "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --max: 920px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
}

::selection { background: var(--brand); color: #17132A; }

a { color: var(--brand-ink); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--text); }
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 3px;
}

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

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------------- Header ---------------- */

.masthead {
  border-bottom: 1px solid var(--line-soft);
  position: sticky;
  top: 0;
  background: rgba(23, 19, 42, 0.92);
  backdrop-filter: blur(6px);
  z-index: 10;
}

.masthead .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 18px;
  padding-bottom: 18px;
}

.wordmark {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.01em;
  color: var(--text);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.wordmark:hover { color: var(--text); }

.wordmark .dot {
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--brand);
  display: inline-block;
}

nav.primary {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 14px;
}

nav.primary a {
  color: var(--text-soft);
  text-decoration: none;
  padding-bottom: 3px;
  border-bottom: 2px solid transparent;
}

nav.primary a:hover,
nav.primary a[aria-current="page"] {
  color: var(--text);
  border-bottom-color: var(--brand);
}

/* ---------------- Eyebrow ---------------- */

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--brand-ink);
  display: block;
  margin-bottom: 10px;
}

/* ---------------- Hero ---------------- */

.hero {
  padding: 68px 0 40px;
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(32px, 5vw, 50px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin: 0 0 18px;
  max-width: 16ch;
}

.hero p.lead {
  font-size: 18px;
  color: var(--text-soft);
  max-width: 52ch;
  margin: 0 0 30px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  padding: 13px 22px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--text);
}

.btn:hover { border-color: var(--text-soft); }

.btn.primary {
  background: var(--brand);
  color: #1A1330;
  border-color: var(--brand);
}

.btn.primary:hover { background: var(--brand-ink); border-color: var(--brand-ink); }

/* ---------------- Ticket strip (signature element) ---------------- */

.ticket-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}

.ticket {
  position: relative;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  padding: 22px 20px 26px;
}

.ticket + .ticket { border-left: none; }

.ticket:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 0; right: -1px; bottom: 0;
  width: 0;
  border-right: 2px dashed var(--line);
}

.ticket::before {
  content: "";
  position: absolute;
  top: -9px; left: 50%;
  transform: translateX(-50%);
  width: 18px; height: 18px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 50%;
}

.ticket-step {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
  letter-spacing: 0.08em;
  margin: 6px 0 10px;
}

.ticket h3 {
  font-family: var(--font-display);
  font-size: 17px;
  margin: 0 0 8px;
}

.ticket p {
  margin: 0;
  color: var(--text-soft);
  font-size: 14.5px;
}

.barcode {
  margin-top: 18px;
  height: 22px;
  background-image: repeating-linear-gradient(
    90deg,
    var(--text-faint) 0 2px,
    transparent 2px 5px,
    var(--text-faint) 5px 6px,
    transparent 6px 10px
  );
  opacity: 0.5;
}

/* ---------------- Sections ---------------- */

section.block {
  padding: 56px 0;
  border-top: 1px solid var(--line-soft);
}

.section-head {
  margin-bottom: 30px;
  max-width: 60ch;
}

.section-head h2 {
  font-family: var(--font-display);
  font-size: 28px;
  margin: 6px 0 12px;
}

.section-head p {
  color: var(--text-soft);
  margin: 0;
}

/* ---------------- How-to steps ---------------- */

.steps {
  counter-reset: step;
  display: grid;
  gap: 0;
}

.step {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 20px;
  padding: 24px 0;
  border-top: 1px solid var(--line-soft);
}

.step:last-child { border-bottom: 1px solid var(--line-soft); }

.step-num {
  counter-increment: step;
  font-family: var(--font-display);
  font-size: 15px;
  color: var(--brand-ink);
}

.step-num::before {
  content: counter(step, decimal-leading-zero);
}

.step h3 {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 17px;
  margin: 0 0 8px;
}

.step p {
  margin: 0;
  color: var(--text-soft);
  max-width: 62ch;
}

.step code {
  font-family: var(--font-mono);
  background: var(--bg-raised);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.92em;
  color: var(--text);
}

/* ---------------- Category cards ---------------- */

.category-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.category {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-top: 3px solid var(--accent, var(--brand));
  padding: 22px;
}

.category .kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent, var(--brand));
  margin-bottom: 10px;
  display: block;
}

.category h3 {
  font-family: var(--font-display);
  font-size: 18px;
  margin: 0 0 8px;
}

.category p {
  margin: 0;
  color: var(--text-soft);
  font-size: 15px;
}

/* ---------------- Callout / notice ---------------- */

.callout {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--brand);
  padding: 24px 26px;
  margin: 8px 0;
}

.callout h2, .callout h3 {
  font-family: var(--font-display);
  margin: 0 0 10px;
  font-size: 19px;
}

.callout p { color: var(--text-soft); margin: 0 0 10px; }
.callout p:last-child { margin-bottom: 0; }
.callout ul { color: var(--text-soft); margin: 10px 0; padding-left: 20px; }
.callout li { margin-bottom: 6px; }

/* ---------------- Table (cookie policy) ---------------- */

.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0 40px;
  font-size: 15px;
}

.data-table th,
.data-table td {
  text-align: left;
  padding: 13px 14px;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: top;
}

.data-table thead th {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-faint);
  border-bottom: 2px solid var(--line);
}

.data-table td.name {
  font-family: var(--font-mono);
  color: var(--text);
  white-space: nowrap;
}

/* ---------------- Prose (policy pages) ---------------- */

.prose { padding: 48px 0 24px; }

.prose .dateline {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-faint);
  margin-bottom: 6px;
}

.prose h1 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 40px);
  margin: 4px 0 20px;
}

.prose h2 {
  font-family: var(--font-display);
  font-size: 21px;
  margin: 38px 0 12px;
  padding-top: 22px;
  border-top: 1px solid var(--line-soft);
}

.prose p, .prose li { color: var(--text-soft); }
.prose ul { padding-left: 20px; }

/* ---------------- Footer ---------------- */

footer.site {
  margin-top: 40px;
  border-top: 1px solid var(--line-soft);
}

footer.site .wrap {
  padding: 34px 24px 46px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 13px;
}

footer.site .cols {
  display: flex;
  gap: 44px;
  flex-wrap: wrap;
}

footer.site .col h4 {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin: 0 0 10px;
}

footer.site .col a {
  display: block;
  margin-bottom: 6px;
  text-decoration: none;
  color: var(--text-soft);
}

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

footer.site .fine { color: var(--text-faint); max-width: 42ch; }

/* ---------------- Responsive ---------------- */

@media (max-width: 760px) {
  .ticket-strip { grid-template-columns: 1fr; }
  .ticket + .ticket { border-left: 1px solid var(--line); border-top: none; }
  .ticket:not(:last-child)::after { display: none; }
  .category-grid { grid-template-columns: 1fr; }
  .step { grid-template-columns: 40px 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}