:root{color-scheme:light;--ink:#163049;--muted:#35526f;--line:#d3e2f1;--bg:#f7fbff;--card:#fff;--accent:#1f6fb2}
*{box-sizing:border-box}
body{margin:0;font-family:"Segoe UI",Tahoma,Geneva,Verdana,sans-serif;background:linear-gradient(160deg,#eef6ff,var(--bg));color:var(--ink);line-height:1.55}
a{color:var(--accent)}
.nav{display:flex;justify-content:space-between;align-items:center;padding:1rem 1.25rem;max-width:960px;margin:0 auto}
.nav .brand{font-weight:700;text-decoration:none;color:var(--ink);font-size:1.15rem}
.nav nav a{margin-left:1rem;text-decoration:none;color:var(--muted);font-weight:600}
main{max-width:860px;margin:0 auto 3rem;padding:0 1.25rem}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:2rem;box-shadow:0 18px 50px rgba(22,48,73,.08)}
h1{margin:0 0 .4rem;font-size:clamp(1.7rem,4vw,2.2rem)}
h2{margin:1.6rem 0 .5rem;font-size:1.15rem}
p,li{color:var(--muted)}
.meta{margin:0 0 1.2rem;font-size:.95rem}
.note{background:#f1f7fd;border-left:4px solid var(--accent);padding:.75rem 1rem;border-radius:8px;margin:1rem 0}
footer{max-width:960px;margin:0 auto;padding:1.5rem 1.25rem;color:var(--muted);font-size:.9rem;display:flex;justify-content:space-between;flex-wrap:wrap;gap:.5rem}
footer a{color:var(--muted)}

/* opt-in mockup */
.flow{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem;margin:1.5rem 0}
.phone{background:#0f172a;border-radius:36px;padding:14px;box-shadow:0 20px 50px rgba(15,23,42,.35);max-width:340px;margin:0 auto}
.screen{background:#fff;border-radius:26px;padding:1.4rem 1.2rem 1.6rem;min-height:560px;display:flex;flex-direction:column}
.screen .bar{display:flex;justify-content:space-between;font-size:.75rem;color:#64748b;margin-bottom:1.2rem}
.screen .step{font-size:.8rem;color:var(--accent);font-weight:700;letter-spacing:.04em;text-transform:uppercase}
.screen h3{margin:.3rem 0 .4rem;font-size:1.3rem;color:var(--ink)}
.screen p{font-size:.92rem;margin:.2rem 0 .9rem}
.field label{display:block;font-size:.8rem;font-weight:600;color:var(--ink);margin-bottom:.3rem}
.field .input{border:1.5px solid #bed3e9;border-radius:10px;padding:.7rem .85rem;font-size:1.05rem;color:var(--ink);background:#f8fbff}
.consent{font-size:.78rem;color:#4b6382;margin:.9rem 0 1rem;line-height:1.45}
.consent a{color:var(--accent)}
.btn-primary{margin-top:auto;background:var(--accent);color:#fff;border-radius:12px;padding:.85rem;text-align:center;font-weight:700}
.btn-ghost{text-align:center;color:var(--accent);font-weight:600;font-size:.9rem;margin-top:.7rem}
.codes{display:flex;gap:.45rem;justify-content:space-between;margin:.4rem 0 .6rem}
.codes span{flex:1;aspect-ratio:1/1.15;border:1.5px solid #bed3e9;border-radius:10px;display:grid;place-items:center;font-size:1.3rem;font-weight:700;color:var(--ink);background:#f8fbff}
.bubble{background:#e9e9eb;color:#111;border-radius:18px;padding:.7rem .9rem;font-size:.92rem;max-width:280px;margin:.5rem 0}
.bubble small{display:block;color:#64748b;font-size:.72rem;margin-bottom:.25rem}
.caption{text-align:center;font-size:.85rem;color:var(--muted);margin-top:.6rem}
@media (max-width:620px){.card{padding:1.3rem}.nav nav a{margin-left:.7rem}}