:root{
  --bg:#f4f3ef; --panel:#ffffff; --ink:#16161a; --muted:#6b6b72; --line:#e3e1db;
  --accent:#1f4fff; --accent-ink:#fff; --soft:#eceae4; --danger:#c62f2f;
  --radius:14px; --shadow:0 1px 2px rgba(0,0,0,.04),0 8px 24px rgba(0,0,0,.05);
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root{ --bg:#0f0f11; --panel:#18181b; --ink:#f2f2f3; --muted:#9a9aa3; --line:#2a2a2f;
    --accent:#5b7cff; --soft:#222226; --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.3); color-scheme:dark; }
}
*{box-sizing:border-box}
html,body{margin:0}
body{background:var(--bg);color:var(--ink);font:15px/1.5 "Inter",system-ui,-apple-system,sans-serif;-webkit-font-smoothing:antialiased}
a{color:inherit}
button,input,textarea,select{font:inherit;color:inherit}
.btn{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);background:var(--panel);padding:8px 14px;border-radius:10px;cursor:pointer;transition:.15s;white-space:nowrap}
.btn:hover{border-color:var(--muted)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn.primary:hover{filter:brightness(1.08)}
.btn.ghost{background:transparent;border-color:transparent}
.btn.ghost:hover{background:var(--soft)}
.btn:disabled{opacity:.5;cursor:default}
.btn svg{width:16px;height:16px;flex:none}
.field{display:flex;flex-direction:column;gap:4px}
.field label{font-size:12px;color:var(--muted);font-weight:500}
.input{width:100%;border:1px solid var(--line);background:var(--panel);border-radius:10px;padding:9px 11px;outline:none;transition:.15s}
.input:focus{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 18%,transparent)}
textarea.input{resize:vertical;min-height:40px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;letter-spacing:-.02em;font-size:18px;text-decoration:none}
.brand .logo{width:28px;height:28px;border-radius:8px;background:var(--ink);color:var(--bg);display:grid;place-items:center;font-size:15px;font-weight:800}
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%) translateY(20px);background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:10px;opacity:0;transition:.25s;pointer-events:none;z-index:99;font-size:14px}
.toast.show{opacity:1;transform:translateX(-50%)}