:root {
  --bg: #0b0c10;
  --bg-alt: #0f1116;
  --surface: #14161c;
  --surface-2: #1a1d24;
  --border: #242833;
  --border-strong: #323744;
  --text: #e8eaed;
  --muted: #9aa1ab;
  --dim: #6d7480;
  --accent: #1cc49d;
  --accent-hover: #35d4ae;
  --accent-ink: #04130f;
  --warning: #e8b73a;
  --danger: #ef5b6b;
  --radius: 10px;
  --radius-lg: 14px;
  --font: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --container: 1120px;
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { margin: 0; line-height: 1.2; letter-spacing: -0.01em; font-weight: 650; }
p { margin: 0; }
kbd {
  font-family: var(--font);
  font-size: 0.85em;
  padding: 1px 6px;
  border: 1px solid var(--border-strong);
  border-bottom-width: 2px;
  border-radius: 5px;
  background: var(--surface-2);
}
code { font-family: var(--mono); font-size: 0.88em; color: var(--text); word-break: break-all; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding-inline: 24px; }
.narrow { max-width: 780px; }
.accent { color: var(--accent); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 18px; border-radius: 8px;
  font: 600 15px/1.2 var(--font);
  border: 1px solid transparent; cursor: pointer; white-space: nowrap;
  transition: background-color .15s ease, border-color .15s ease, color .15s ease;
}
.btn svg { width: 17px; height: 17px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary { background: var(--surface-2); border-color: var(--border-strong); color: var(--text); }
.btn-secondary:hover { border-color: #465063; background: #20242c; }
.btn-lg { padding: 13px 22px; font-size: 16px; }
.btn-sm { padding: 8px 14px; font-size: 14px; }
.btn-block { width: 100%; }
.btn:disabled { opacity: .6; cursor: default; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Header + tabs */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(11, 12, 16, 0.94); border-bottom: 1px solid var(--border); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); }
.header-inner { display: flex; align-items: center; gap: 32px; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand img:first-child { width: 28px; height: 28px; }
.brand-text { height: 12px; width: auto; }
.tabs { display: flex; align-items: stretch; gap: 4px; height: 100%; flex: 1; }
.tabs a {
  display: inline-flex; align-items: center; padding: 0 12px; height: 100%;
  font-size: 15px; font-weight: 500; color: var(--muted);
  border-bottom: 2px solid transparent; margin-bottom: -1px;
  transition: color .15s ease, border-color .15s ease;
}
.tabs a:hover { color: var(--text); }
.tabs a[aria-current="page"] { color: var(--text); border-bottom-color: var(--accent); }
.header-actions { display: flex; align-items: center; gap: 10px; }
.nav-toggle { display: none; margin-left: auto; background: none; border: 1px solid var(--border-strong); border-radius: 8px; padding: 8px 9px; cursor: pointer; }
.nav-toggle span { display: block; width: 18px; height: 2px; margin: 4px 0; background: var(--text); border-radius: 2px; }

/* Page header (sub pages) */
.page-head { padding: 64px 0 40px; border-bottom: 1px solid var(--border); background: var(--bg-alt); }
.page-head h1 { font-size: clamp(1.9rem, 3.4vw, 2.6rem); }
.page-head p { margin-top: 12px; max-width: 620px; color: var(--muted); font-size: 1.08rem; }
.eyebrow { display: block; margin-bottom: 10px; font-size: 13px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--accent); }

/* Hero */
.hero { padding: 80px 0 72px; border-bottom: 1px solid var(--border); }
.hero-inner { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 64px; align-items: center; }
.hero h1 { font-size: clamp(2.3rem, 5vw, 3.5rem); font-weight: 700; letter-spacing: -0.02em; }
.hero .lead { margin-top: 18px; font-size: clamp(1.02rem, 1.5vw, 1.18rem); color: var(--muted); max-width: 540px; }
.hero-cta { margin-top: 30px; display: flex; flex-wrap: wrap; gap: 12px; }
.hero-note { margin-top: 18px; font-size: 14px; color: var(--dim); }
.hero-visual { display: flex; justify-content: center; }
.app-window { width: min(320px, 80vw); border-radius: 12px; overflow: hidden; border: 1px solid var(--border-strong); background: #07080b; box-shadow: 0 24px 60px -24px rgba(0, 0, 0, 0.8); }
.app-window-bar { display: flex; gap: 6px; padding: 9px 11px; background: #111319; border-bottom: 1px solid var(--border); }
.app-window-bar i { width: 9px; height: 9px; border-radius: 50%; background: #2c3039; }

/* Facts row */
.facts { display: grid; grid-template-columns: repeat(4, 1fr); border-bottom: 1px solid var(--border); }
.facts > div { padding: 26px 24px; }
.facts > div + div { border-left: 1px solid var(--border); }
.facts strong { display: block; font-size: 1rem; font-weight: 600; }
.facts span { color: var(--dim); font-size: 14px; }

/* Sections */
.section { padding: 72px 0; }
.section + .section { border-top: 1px solid var(--border); }
.section-alt { background: var(--bg-alt); }
.section-head { max-width: 640px; margin-bottom: 40px; }
.section-head h2 { font-size: clamp(1.6rem, 2.8vw, 2.1rem); }
.section-head p { margin-top: 10px; color: var(--muted); font-size: 1.05rem; }
.section-head.center { text-align: center; margin-inline: auto; }

/* Feature grid */
.grid { display: grid; gap: 16px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.card { padding: 24px; border-radius: var(--radius-lg); background: var(--surface); border: 1px solid var(--border); }
.card h3 { font-size: 1.05rem; margin: 14px 0 6px; }
.card p { color: var(--muted); font-size: 0.95rem; }
.icon { width: 38px; height: 38px; border-radius: 9px; display: grid; place-items: center; background: var(--surface-2); border: 1px solid var(--border-strong); }
.icon svg { width: 19px; height: 19px; fill: none; stroke: var(--accent); stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }

/* Steps */
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.step { padding: 24px; border-radius: var(--radius-lg); background: var(--surface); border: 1px solid var(--border); }
.step-num { display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; border: 1px solid var(--border-strong); font-size: 14px; font-weight: 600; color: var(--accent); }
.step h3 { margin: 14px 0 6px; font-size: 1.05rem; }
.step p { color: var(--muted); font-size: 0.95rem; }
.step a { color: var(--accent); }

/* Split */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.split p { color: var(--muted); }
.split h2 { font-size: clamp(1.6rem, 2.8vw, 2.1rem); margin-bottom: 14px; }
.checklist { list-style: none; padding: 0; margin: 22px 0 0; display: grid; gap: 10px; }
.checklist li { position: relative; padding-left: 28px; color: var(--text); }
.checklist li::before {
  content: ''; position: absolute; left: 0; top: 6px; width: 16px; height: 16px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231cc49d' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m5 12 4 4 10-10'/%3E%3C/svg%3E") center/16px no-repeat;
}
.screens { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; align-items: start; }
.screens figure { margin: 0; border-radius: 10px; overflow: hidden; border: 1px solid var(--border-strong); background: #07080b; }
.screens figcaption { padding: 8px 10px; font-size: 13px; color: var(--dim); border-top: 1px solid var(--border); background: var(--surface); }

/* CTA band */
.cta-band { padding: 56px 0; border-top: 1px solid var(--border); background: var(--bg-alt); }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.cta-inner h2 { font-size: 1.5rem; }
.cta-inner p { color: var(--muted); margin-top: 6px; }
.cta-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* Downloads */
.downloads { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.btn.unavailable { opacity: .55; pointer-events: none; }
.dl-choice { width: min(460px, calc(100% - 32px)); padding: 26px; border-radius: var(--radius-lg); background: var(--surface); color: var(--text); border: 1px solid var(--border-strong); }
.dl-choice::backdrop { background: rgba(0, 0, 0, 0.65); }
.dl-choice h2 { font-size: 1.2rem; }
.dl-choice > p { margin: 6px 0 18px; color: var(--muted); font-size: 0.95rem; }
.choice-list { display: grid; gap: 10px; margin-bottom: 14px; }
.choice { display: grid; gap: 4px; padding: 14px 16px; border-radius: var(--radius); background: var(--bg); border: 1px solid var(--border-strong); color: var(--text); text-decoration: none; transition: border-color .15s ease, background-color .15s ease; }
.choice:hover, .choice:focus-visible { border-color: var(--accent); background: var(--surface-2); }
.choice strong { font-size: 1rem; }
.choice > span { color: var(--muted); font-size: 14px; }
.choice small { color: var(--dim); font-size: 13px; }
.choice.unavailable { opacity: .55; pointer-events: none; }
.dl-card { padding: 26px; border-radius: var(--radius-lg); background: var(--surface); border: 1px solid var(--border); display: flex; flex-direction: column; gap: 20px; }
.dl-card.recommended { border-color: #2e6f5f; }
.dl-os { display: flex; align-items: center; gap: 14px; }
.dl-os svg { width: 36px; height: 36px; flex-shrink: 0; fill: var(--text); }
.dl-os h3 { font-size: 1.15rem; }
.dl-os span { color: var(--dim); font-size: 14px; }
.badge { margin-left: 8px; padding: 2px 8px; border-radius: 999px; font-size: 12px; font-weight: 600; color: var(--accent); background: rgba(28, 196, 157, 0.1); border: 1px solid rgba(28, 196, 157, 0.3); vertical-align: 2px; }
.notes { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; color: var(--muted); font-size: 14px; }
.notes li { padding-left: 14px; position: relative; }
.notes li::before { content: ''; position: absolute; left: 0; top: 10px; width: 5px; height: 5px; border-radius: 50%; background: var(--dim); }
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius-lg); }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
th, td { text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-weight: 600; background: var(--surface); width: 30%; }
tr:last-child th, tr:last-child td { border-bottom: 0; }

/* Account */
.account-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; align-items: start; }
.acc-card { padding: 26px; border-radius: var(--radius-lg); background: var(--surface); border: 1px solid var(--border); display: flex; flex-direction: column; gap: 18px; }
.acc-head { display: flex; gap: 14px; align-items: flex-start; }
.acc-head h2 { font-size: 1.12rem; margin-bottom: 4px; }
.acc-head p { color: var(--muted); font-size: 0.95rem; }
.acc-step { flex-shrink: 0; width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; font-size: 14px; font-weight: 600; color: var(--accent); border: 1px solid var(--border-strong); }
.acc-label { display: block; font-size: 13px; font-weight: 600; color: var(--muted); margin-bottom: 6px; }
.acc-form { display: flex; flex-direction: column; }
.acc-form input {
  width: 100%; margin-bottom: 14px; padding: 11px 13px; border-radius: 8px;
  background: var(--bg); border: 1px solid var(--border-strong); color: var(--text);
  font: 15px/1.3 var(--mono); letter-spacing: .5px;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.acc-form input::placeholder { color: #4d5461; }
.acc-form input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(28, 196, 157, 0.15); }
.acc-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.acc-actions .btn { flex: 1 1 150px; }
.acc-result { display: flex; flex-direction: column; gap: 12px; padding-top: 18px; border-top: 1px solid var(--border); }
.acc-number { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 14px; border-radius: 8px; background: var(--bg); border: 1px solid var(--border-strong); }
.acc-number output { font: 600 clamp(1rem, 3.4vw, 1.25rem)/1.3 var(--mono); letter-spacing: 1.5px; color: var(--text); user-select: all; }
.icon-btn { flex-shrink: 0; width: 34px; height: 34px; border-radius: 7px; display: grid; place-items: center; background: var(--surface-2); border: 1px solid var(--border-strong); color: var(--muted); cursor: pointer; }
.icon-btn:hover { color: var(--text); }
.icon-btn svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.icon-btn.copied { color: var(--accent); border-color: var(--accent); }
.acc-warn { display: flex; gap: 8px; align-items: flex-start; font-size: 14px; color: var(--warning); }
.acc-warn svg { width: 16px; height: 16px; flex-shrink: 0; margin-top: 3px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.acc-status { padding: 12px 14px; border-radius: 8px; font-size: 14.5px; border: 1px solid var(--border-strong); background: var(--bg); }
.acc-status.ok { border-color: #2e6f5f; }
.acc-status.ok strong { color: var(--accent); }
.acc-status.err { border-color: #7a3440; color: #f3a1ab; }
.btn[aria-busy="true"] { pointer-events: none; opacity: .75; }
.btn[aria-busy="true"] .btn-label::after { content: ''; display: inline-block; width: 11px; height: 11px; margin-left: 9px; border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%; vertical-align: -1px; animation: spin .7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.info-list { display: grid; gap: 14px; margin-top: 8px; }
.info-list div { padding: 18px 20px; border-radius: var(--radius-lg); border: 1px solid var(--border); background: var(--surface); }
.info-list h3 { font-size: 1rem; margin-bottom: 4px; }
.info-list p { color: var(--muted); font-size: 0.95rem; }

/* FAQ */
.faq { display: grid; gap: 10px; }
.faq details { border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border); }
.faq summary { list-style: none; cursor: pointer; padding: 17px 48px 17px 20px; position: relative; font-weight: 600; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; position: absolute; right: 20px; top: 50%; transform: translateY(-50%); font-size: 20px; font-weight: 400; color: var(--muted); }
.faq details[open] summary::after { content: '−'; }
.faq details p { padding: 0 20px 18px; color: var(--muted); }
.faq details a { color: var(--accent); }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: 40px 0; }
.footer-inner { display: grid; grid-template-columns: 1.4fr repeat(2, 1fr); gap: 32px; }
.footer-inner h4 { margin: 0 0 12px; font-size: 13px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--dim); }
.footer-inner ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; font-size: 14px; color: var(--muted); }
.footer-inner a:hover { color: var(--text); }
.footer-about p { margin-top: 12px; font-size: 14px; color: var(--dim); max-width: 340px; }
.fineprint { margin-top: 32px; padding-top: 20px; border-top: 1px solid var(--border); font-size: 13px; color: var(--dim); }

/* Responsive */
@media (max-width: 960px) {
  .hero-inner, .split { grid-template-columns: 1fr; gap: 40px; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3, .steps { grid-template-columns: 1fr; }
  .facts { grid-template-columns: repeat(2, 1fr); }
  .facts > div:nth-child(3) { border-left: 0; }
  .facts > div:nth-child(n+3) { border-top: 1px solid var(--border); }
}
@media (max-width: 820px) {
  .header-inner { gap: 16px; }
  .nav-toggle { display: block; }
  .tabs {
    position: absolute; top: 64px; left: 0; right: 0; height: auto;
    flex-direction: column; gap: 0; padding: 8px 24px 16px;
    background: var(--bg); border-bottom: 1px solid var(--border);
    display: none;
  }
  .tabs.open { display: flex; }
  .tabs a { height: auto; padding: 12px 0; border-bottom: 1px solid var(--border); margin: 0; }
  .tabs a[aria-current="page"] { border-bottom-color: var(--border); color: var(--accent); }
  .header-actions { display: none; }
  .downloads, .account-grid, .grid-2 { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-about { grid-column: 1 / -1; }
  .hero { padding: 56px 0; }
  .page-head { padding: 44px 0 32px; }
  .section { padding: 56px 0; }
}
@media (max-width: 520px) {
  .container { padding-inline: 16px; }
  .grid-4 { grid-template-columns: 1fr; }
  .screens { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
  .screens figcaption { font-size: 11px; padding: 6px; }
  .hero-cta .btn { flex: 1 1 100%; }
  .acc-card, .dl-card { padding: 20px; }
  th { width: 38%; }
  th, td { padding: 12px 14px; }
}

/* Crypto payments */
.coins { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; }
.coin-btn {
  display: flex; flex-direction: column; align-items: flex-start; gap: 2px;
  padding: 10px 12px; border-radius: 8px; cursor: pointer; text-align: left;
  font: inherit; color: var(--text); background: var(--bg); border: 1px solid var(--border-strong);
  transition: border-color .15s ease, background-color .15s ease;
}
.coin-btn strong { font-size: 15px; font-weight: 650; }
.coin-btn span { font-size: 12.5px; color: var(--dim); }
.coin-btn:hover { border-color: #465063; }
.coin-btn[aria-checked="true"] { border-color: var(--accent); background: rgba(28, 196, 157, 0.08); }
.pay-body { display: flex; flex-direction: column; gap: 18px; }
.pay-price {
  display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  padding: 12px 14px; border-radius: 8px; background: var(--bg); border: 1px solid var(--border-strong);
}
.pay-price span { color: var(--muted); font-size: 14px; }
.pay-price strong { font: 600 1.15rem/1.3 var(--mono); color: var(--accent); }
.pay-address output { font: 500 13.5px/1.45 var(--mono); letter-spacing: 0; word-break: break-all; }
.acc-note { margin-top: 8px; font-size: 13.5px; color: var(--dim); }
.pay-empty { color: var(--muted); font-size: 14.5px; }
.check-card { margin-top: 16px; }
.check-row { flex-direction: row; flex-wrap: wrap; gap: 10px; }
.check-row input { flex: 1 1 240px; margin-bottom: 0; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
@media (max-width: 1040px) {
  .coins { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

.pay-coins-row { display: flex; gap: 8px; }
.pay-coins-row .coin-logo { width: 30px; height: 30px; display: block; }