:root{
  --bg:#f7f8fc; --panel:#fff; --soft:#eef1f8; --ink:#0f1730; --muted:#5c678a; --line:#dfe4f0;
  --accent:#e8372a; --accent-ink:#fff; --accent-soft:#fdeae8; --ok:#16a34a; --warn:#b45309;
  --shadow:0 1px 2px #0b11240d,0 6px 24px #0b11240f; --radius:16px;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#0b1124; --panel:#121a33; --soft:#0f1730; --ink:#e8ecf7; --muted:#9aa7c9; --line:#24304f;
  --accent:#ff5a4e; --accent-soft:#3a1a1e; --shadow:none;}}
*{box-sizing:border-box}
[hidden]{display:none !important}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.55 ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;-webkit-font-smoothing:antialiased}
a{color:inherit}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--accent);color:var(--accent-ink);border:0;border-radius:12px;padding:11px 18px;font:inherit;font-weight:650;text-decoration:none;cursor:pointer;transition:transform .15s,filter .15s}
.btn:hover{filter:brightness(1.07);transform:translateY(-1px)}
.btn.big{padding:15px 24px;font-size:17px}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn.ghost.light{color:#fff;border-color:#ffffff40}
.btn.small{padding:7px 12px;font-size:14px;border-radius:10px}
.btn:disabled{opacity:.5;cursor:default;transform:none}
.topnav{position:sticky;top:0;z-index:20;backdrop-filter:blur(10px)}
.topnav .wrap{display:flex;align-items:center;gap:10px;height:64px}
.dark-nav{background:#070b18cc;color:#fff;border-bottom:1px solid #ffffff14}
.light-nav{background:color-mix(in srgb,var(--panel) 88%,transparent);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:800;font-size:19px;letter-spacing:-.02em}
.spacer{flex:1}
input,select,textarea{font:inherit;color:inherit;background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:11px 13px;width:100%}
input:focus,select:focus,textarea:focus{outline:2px solid color-mix(in srgb,var(--accent) 55%,transparent);outline-offset:1px}
label{font-size:14px;color:var(--muted)}
.msg{font-size:14px;color:var(--muted)}
.err{color:var(--accent)}
.legal{max-width:820px;margin:0 auto;padding:40px 20px 80px}
.legal h1{letter-spacing:-.02em}.legal h2{font-size:19px;margin-top:28px}
.legal-foot{text-align:center;padding:0 20px 40px;font-size:14px}
.legal ul{padding-left:20px}.legal li{margin:6px 0}
.legal .note{background:var(--accent-soft);border-radius:12px;padding:12px 14px;font-size:14px}