:root{ --bg-dark:#0b1220; --card-bg:rgba(17,24,39,.55); --card-border:rgba(255,255,255,.08); --text:#e5e7eb; --muted:#9ca3af; --brand:#60a5fa; --brand-strong:#3b82f6; }
*{box-sizing:border-box} html,body{height:100%} body{margin:0;font-family:Inter,system-ui,Segoe UI,Roboto,Arial,sans-serif;color:var(--text);background:var(--bg-dark)}
.bg{position:fixed;inset:0;background:radial-gradient(900px 600px at 70% 10%, rgba(59,130,246,.18), transparent 60%), radial-gradient(900px 600px at 10% 90%, rgba(16,185,129,.18), transparent 60%);z-index:-2}
.overlay{position:fixed;inset:0;background:linear-gradient(180deg, rgba(2,6,23,.65), rgba(2,6,23,.75));backdrop-filter:blur(2px);z-index:-1}
.wrap{min-height:100%;display:grid;place-items:center;padding:32px}
.panel{width:100%;max-width:460px;background:var(--card-bg);border:1px solid var(--card-border);border-radius:16px;box-shadow:0 20px 60px rgba(0,0,0,.35);padding:24px 22px}
.panel-head{margin-bottom:14px;text-align:center}
.brand{margin:0 0 6px;font-weight:700;letter-spacing:.3px}
.subtitle{margin:0;color:var(--muted);font-size:14px}
.alert{background:rgba(239,68,68,.15);border:1px solid rgba(239,68,68,.35);color:#fecaca;padding:10px 12px;border-radius:10px;margin:10px 0}
.form{display:grid;gap:10px}
.form label{font-size:13px;color:#cbd5e1}
.form input[type="email"],.form input[type="password"]{width:100%;padding:12px 12px;border:1px solid rgba(255,255,255,.12);border-radius:12px;background:rgba(2,6,23,.35);color:var(--text);outline:none}
.form input:focus{border-color:rgba(96,165,250,.7);box-shadow:0 0 0 3px rgba(59,130,246,.25)}
.btn{width:100%;margin-top:8px;padding:12px 14px;background:linear-gradient(180deg, var(--brand), var(--brand-strong));border:0;border-radius:12px;color:#fff;font-weight:600;cursor:pointer;transition:.15s transform ease}
.btn:hover{transform:translateY(-1px)}
.panel-foot{margin-top:14px;text-align:center;color:var(--muted)}