:root {
  --brand: #0e9488;
  --brand-strong: #0b7a70;
  --brand-soft: #e3f4f2;
  --owed: #1f8f4e;
  --owe: #e2622b;
  --ink: #0f1b1d;
  --ink-2: #4a5a5d;
  --ink-3: #7b8a8d;
  --bg: #f6f9f9;
  --surface: #ffffff;
  --line: #e2eaea;
  --shadow: 0 12px 40px rgba(15, 27, 29, 0.10);
  --radius: 20px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand: #2cc7b7;
    --brand-strong: #5fd9cc;
    --brand-soft: #11302d;
    --owed: #4cd187;
    --owe: #ff8a52;
    --ink: #eef5f4;
    --ink-2: #a9b9b8;
    --ink-3: #7d8e8d;
    --bg: #0a1112;
    --surface: #131c1d;
    --line: #223031;
    --shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 3px solid var(--brand); outline-offset: 3px; border-radius: 6px; }

.wrap { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 19px; color: var(--ink); letter-spacing: -0.01em; }
.brand:hover { text-decoration: none; }
.brand img { border-radius: 8px; }
.site-nav { display: flex; gap: 22px; font-size: 15px; }
.site-nav a { color: var(--ink-2); }
.site-nav a:hover { color: var(--ink); text-decoration: none; }
@media (max-width: 720px) { .site-nav a.optional { display: none; } .site-nav { gap: 16px; } }

/* Hero */
.hero { padding: 72px 0 40px; }
.hero .wrap { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 48px; align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 600; color: var(--brand-strong); background: var(--brand-soft); padding: 6px 12px; border-radius: 999px; }
h1 { font-size: clamp(38px, 6vw, 62px); line-height: 1.05; letter-spacing: -0.035em; margin: 18px 0 18px; }
h1 em { font-style: normal; color: var(--brand); }
.lede { font-size: 20px; color: var(--ink-2); max-width: 34em; margin: 0 0 28px; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.btn { display: inline-flex; align-items: center; gap: 10px; padding: 14px 22px; border-radius: 14px; font-weight: 600; font-size: 16px; }
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--ink); color: var(--bg); }
.btn-primary[aria-disabled="true"] { cursor: default; }
.btn-ghost { color: var(--ink); border: 1px solid var(--line); background: var(--surface); }
.btn-ghost:hover { border-color: var(--ink-3); }
.fineprint { font-size: 14px; color: var(--ink-3); margin-top: 14px; }

.hero-art { position: relative; display: flex; justify-content: center; }
.phone {
  width: min(300px, 70vw);
  border-radius: 38px;
  border: 9px solid #0d1314;
  background: #0d1314;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.phone img { border-radius: 29px; }
.hero-art .phone.back { position: absolute; transform: translate(-46%, 34px) rotate(-6deg) scale(0.88); opacity: 0.92; }
.hero-art .phone.front { position: relative; transform: translateX(16%) rotate(3deg); }
.balance-chip {
  position: absolute; left: 0; bottom: 36px; z-index: 2;
  background: var(--surface); border: 1px solid var(--line); border-radius: 16px;
  padding: 12px 16px; box-shadow: var(--shadow); font-size: 15px;
}
.balance-chip strong { display: block; color: var(--owed); font-size: 18px; }

/* Sections */
section { padding: 64px 0; }
.section-head { max-width: 640px; margin: 0 0 36px; }
h2 { font-size: clamp(28px, 4vw, 40px); line-height: 1.12; letter-spacing: -0.025em; margin: 0 0 12px; }
.section-head p { color: var(--ink-2); font-size: 18px; margin: 0; }

.promise { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.promise div { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.promise strong { display: block; font-size: 30px; letter-spacing: -0.02em; color: var(--brand); }
.promise span { color: var(--ink-2); font-size: 15px; }

.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.feature .icon { width: 44px; height: 44px; border-radius: 12px; background: var(--brand-soft); color: var(--brand-strong); display: grid; place-items: center; margin-bottom: 14px; }
.feature .icon svg { width: 22px; height: 22px; }
.feature h3 { margin: 0 0 6px; font-size: 18px; letter-spacing: -0.01em; }
.feature p { margin: 0; color: var(--ink-2); font-size: 15.5px; }

.splits { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.splits span { background: var(--surface); border: 1px solid var(--line); border-radius: 999px; padding: 8px 14px; font-size: 15px; font-weight: 500; }

.showcase { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; align-items: start; }
.showcase figure { margin: 0; }
.showcase .phone { width: 100%; border-width: 7px; border-radius: 30px; }
.showcase .phone img { border-radius: 23px; }
.showcase figcaption { text-align: center; font-size: 15px; color: var(--ink-2); margin-top: 12px; }

.how { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; counter-reset: step; }
.how li { list-style: none; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.how li::before { counter-increment: step; content: counter(step); display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: var(--brand); color: #fff; font-weight: 700; margin-bottom: 12px; }
.how h3 { margin: 0 0 6px; font-size: 18px; }
.how p { margin: 0; color: var(--ink-2); font-size: 15.5px; }
ol.how { padding: 0; margin: 0; }

.simplify { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.ledger { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.ledger h3 { margin: 0 0 12px; font-size: 15px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-3); }
.ledger ul { margin: 0; padding: 0; list-style: none; }
.ledger li { display: flex; justify-content: space-between; gap: 12px; padding: 10px 0; border-top: 1px solid var(--line); font-size: 16px; }
.ledger li:first-child { border-top: 0; }
.ledger .amt { font-weight: 600; color: var(--owe); white-space: nowrap; }
.ledger.after { border-color: var(--brand); }
.ledger.after .amt { color: var(--owed); }
.ledgers { display: grid; gap: 14px; }

.faq details { background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 18px 22px; margin-bottom: 12px; }
.faq summary { cursor: pointer; font-weight: 600; font-size: 17px; }
.faq details p { color: var(--ink-2); margin: 10px 0 0; }

.final { text-align: center; }
.final .wrap { background: var(--surface); border: 1px solid var(--line); border-radius: 28px; padding: 56px 24px; }
.final img { margin: 0 auto 18px; border-radius: 22px; }
.final .cta-row { justify-content: center; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding: 28px 0 40px; font-size: 14px; color: var(--ink-3); }
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; }
.site-footer nav { display: flex; gap: 18px; }
.site-footer a { color: var(--ink-2); }

/* Long-form pages (privacy, support) */
.doc { padding: 56px 0 72px; }
.doc .wrap { max-width: 760px; }
.doc h1 { font-size: clamp(34px, 5vw, 48px); margin-top: 0; }
.doc h2 { font-size: 24px; margin: 36px 0 10px; }
.doc p, .doc li { color: var(--ink-2); }
.doc .updated { color: var(--ink-3); font-size: 15px; }
.doc table { width: 100%; border-collapse: collapse; font-size: 15px; margin: 12px 0; }
.doc th, .doc td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.doc th { color: var(--ink); }
.doc td { color: var(--ink-2); }
.table-scroll { overflow-x: auto; }
.contact-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; margin: 20px 0; }

@media (max-width: 900px) {
  .hero .wrap, .simplify { grid-template-columns: 1fr; }
  .hero { padding-top: 48px; }
  .hero-art { margin-top: 12px; padding-bottom: 20px; }
  .features, .how, .promise { grid-template-columns: 1fr 1fr; }
  .showcase { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .features, .how, .promise { grid-template-columns: 1fr; }
  .hero-art .phone.back { display: none; }
  .hero-art .phone.front { transform: none; }
  .balance-chip { left: 4px; bottom: 16px; }
  section { padding: 48px 0; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }