*{box-sizing:border-box;margin:0;padding:0}

:root{
  --bg:#020617;
  --text:#f1f5f9;
  --text-strong:#ffffff;
  --muted:#94a3b8;
  --muted-2:#cbd5e1;
  --surface:#0f172a;
  --border:#1e293b;
  --border-strong:#334155;
  --hover-border:#64748b;
  --accent:#34d399;
  --primary:#059669;
  --primary-hover:#10b981;
  --input-bg:#0b1222;
  --glow:0 0 40px rgba(16,185,129,.25);
  --tag-bg:rgba(52,211,153,.1);
  --priv-bg:linear-gradient(90deg,rgba(6,78,59,.4),#0f172a);
  --priv-border:#065f46;
  --danger-bg:rgba(239,68,68,.12);
  --danger-text:#fca5a5;
  --danger-border:rgba(239,68,68,.4);
  --footer-text:#64748b;
  color-scheme:dark;
}

[data-theme="light"]{
  --bg:#f8fafc;
  --text:#0f172a;
  --text-strong:#020617;
  --muted:#64748b;
  --muted-2:#334155;
  --surface:#ffffff;
  --border:#e2e8f0;
  --hover-border:#94a3b8;
  --border-strong:#cbd5e1;
  --accent:#059669;
  --primary:#059669;
  --primary-hover:#047857;
  --input-bg:#ffffff;
  --glow:0 0 40px rgba(5,150,105,.18);
  --tag-bg:rgba(16,185,129,.12);
  --priv-bg:linear-gradient(90deg,#d1fae5,#ffffff);
  --priv-border:#a7f3d0;
  --danger-bg:#fef2f2;
  --danger-text:#b91c1c;
  --danger-border:#fecaca;
  --footer-text:#64748b;
  color-scheme:light;
}

body{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.5;transition:background .2s,color .2s}
a{color:inherit;text-decoration:none}
.wrap{max-width:1152px;margin:0 auto;padding:0 24px}
header{display:flex;align-items:center;justify-content:space-between;padding:20px 0;flex-wrap:wrap;gap:12px}
.logo{font-size:1.5rem;font-weight:800;letter-spacing:-.02em}
.logo span{color:var(--accent)}
nav{display:flex;gap:24px;font-size:.9rem;color:var(--muted-2)}
nav a:hover{color:var(--text-strong)}
.btns{display:flex;gap:8px;align-items:center}

.btn{display:inline-block;padding:10px 18px;border-radius:10px;font-size:.9rem;font-weight:600;border:1px solid var(--border-strong);color:inherit;background:transparent;cursor:pointer;font-family:inherit;text-align:center}
.btn:hover{border-color:var(--hover-border)}
.btn:disabled{opacity:.6;cursor:wait}
.btn-primary{background:var(--primary);border-color:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-hover);border-color:var(--primary-hover)}
.btn-lg{padding:12px 32px;font-size:1rem}
.btn-block{display:block;width:100%}
.theme-toggle{padding:8px 12px;line-height:1;font-size:1.1rem}
.glow{box-shadow:var(--glow)}

.hero{text-align:center;padding:72px 0 96px}
.tag{display:inline-block;font-size:.75rem;text-transform:uppercase;letter-spacing:.12em;color:var(--accent);background:var(--tag-bg);padding:4px 12px;border-radius:999px;margin-bottom:24px}
.hero h1{font-size:clamp(2.2rem,5vw,3.75rem);font-weight:800;line-height:1.15;margin-bottom:24px}
.hero h1 span{color:var(--accent)}
.hero p{color:var(--muted-2);max-width:640px;margin:0 auto 40px;font-size:1.1rem}
.cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

section{padding:64px 0}
h2{font-size:2rem;font-weight:700;text-align:center;margin-bottom:12px}
.sub{text-align:center;color:var(--muted);margin-bottom:48px}
.grid3{display:grid;gap:24px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.card{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:24px}
.card .ic{font-size:2rem;margin-bottom:12px}
.card h3{font-size:1.15rem;margin-bottom:8px}
.card p{color:var(--muted);font-size:.9rem}
.features{list-style:none;display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));color:var(--muted-2)}
.features li{background:var(--surface);border-radius:12px;padding:16px}
.priv{background:var(--priv-bg);border:1px solid var(--priv-border);border-radius:16px;padding:40px}
.priv h2{text-align:left;font-size:1.7rem}
.priv p{color:var(--muted-2);max-width:720px}
.final{text-align:center}
footer{border-top:1px solid var(--border);padding:32px 0;text-align:center;font-size:.85rem;color:var(--footer-text)}

/* Formulários e autenticação */
.auth{max-width:420px;margin:48px auto}
.auth .card{padding:32px}
.page-title{font-size:1.6rem;font-weight:700;margin-bottom:8px}
.auth-sub{color:var(--muted);font-size:.9rem;margin-bottom:24px}
.field{display:grid;gap:6px;margin-bottom:16px}
.field label{font-size:.875rem;color:var(--muted-2)}
.field input{padding:12px 14px;border-radius:10px;border:1px solid var(--border-strong);background:var(--input-bg);color:var(--text);font:inherit;width:100%}
.field input:focus{outline:2px solid var(--accent);outline-offset:1px}
.alert{display:none;padding:12px 14px;border-radius:10px;font-size:.9rem;margin-bottom:16px}
.alert.show{display:block}
.alert-error{background:var(--danger-bg);color:var(--danger-text);border:1px solid var(--danger-border)}

@media(max-width:720px){nav{display:none}}