:root{--c:#00e0ff}*{box-sizing:border-box}
body{margin:0;background:#000;color:#f2f2f7;font:16px -apple-system,system-ui,sans-serif}
header{display:flex;justify-content:space-between;align-items:center;padding:14px 18px;position:sticky;top:0;background:#000d;backdrop-filter:blur(12px);border-bottom:1px solid #222}
h1{font-size:18px;margin:0;letter-spacing:.15em;color:var(--c)}
.seg{display:flex;background:#1c1c1e;border-radius:10px;padding:3px}
.seg button{min-height:44px;padding:0 22px;border:0;border-radius:8px;background:none;color:#aaa;font-size:16px}
.seg .on{background:#2c2c2e;color:#fff}
main{max-width:520px;margin:0 auto;padding:18px}
.card{background:#1c1c1e;border-radius:16px;padding:18px;margin-bottom:16px}
.btn,button.btn{display:inline-block;min-height:44px;line-height:44px;padding:0 20px;border:0;border-radius:12px;background:var(--c);color:#000;font-weight:600;font-size:16px;text-decoration:none;margin:6px 8px 0 0}
.btn.sub{background:#2c2c2e;color:#fff}
.mono{font-family:ui-monospace,Menlo,monospace;color:var(--c);margin:10px 0}
input[type=file]{width:100%;color:#aaa}small{color:#888}