:root{
    --bg-1:#0b1020;
    --bg-2:#121933;
    --bg-3:#1e2a58;
    --card:#ffffff;
    --text:#151a28;
    --muted:#6a7288;
    --line:rgba(19,25,44,.08);
    --primary:#5b7cff;
    --primary-2:#7d5cff;
    --danger:#ef4444;
    --warning:#f59e0b;
    --success:#16a34a;
    --shadow-1:0 20px 60px rgba(0,0,0,.28);
    --shadow-2:0 10px 30px rgba(25,35,74,.18);
    --radius-xl:28px;
    --radius-lg:20px;
    --radius-md:16px;
    --radius-sm:12px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body.auth-page{
    min-height:100vh;
    font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
    color:var(--text);
    background:
        radial-gradient(circle at 15% 20%, rgba(125,92,255,.20), transparent 26%),
        radial-gradient(circle at 85% 15%, rgba(91,124,255,.24), transparent 24%),
        radial-gradient(circle at 50% 100%, rgba(62,207,142,.10), transparent 30%),
        linear-gradient(135deg, var(--bg-1), var(--bg-2) 45%, var(--bg-3));
}

.auth-shell{
    min-height:100vh;
    display:grid;
    grid-template-columns:1.05fr .95fr;
    overflow:hidden;
}

.auth-hero{
    position:relative;
    isolation:isolate;
    background:
        radial-gradient(circle at 22% 18%, rgba(255,255,255,.18), transparent 18%),
        radial-gradient(circle at 78% 26%, rgba(91,124,255,.30), transparent 23%),
        radial-gradient(circle at 60% 80%, rgba(125,92,255,.24), transparent 26%),
        linear-gradient(160deg, rgba(255,255,255,.08), rgba(255,255,255,.02));
}
.auth-hero::before,
.auth-hero::after{
    content:"";
    position:absolute;
    inset:auto;
    border-radius:32px;
    filter:blur(1px);
    transform-style:preserve-3d;
}
.auth-hero::before{
    width:340px;
    height:340px;
    left:10%;
    top:12%;
    background:linear-gradient(135deg, rgba(255,255,255,.10), rgba(255,255,255,.02));
    border:1px solid rgba(255,255,255,.16);
    box-shadow:
        inset 0 1px 0 rgba(255,255,255,.35),
        0 30px 60px rgba(0,0,0,.18);
    transform:rotate(-10deg);
}
.auth-hero::after{
    width:240px;
    height:240px;
    right:12%;
    bottom:14%;
    background:linear-gradient(135deg, rgba(91,124,255,.35), rgba(125,92,255,.10));
    border:1px solid rgba(255,255,255,.12);
    box-shadow:
        inset 0 1px 0 rgba(255,255,255,.28),
        0 22px 40px rgba(0,0,0,.18);
    transform:rotate(12deg);
}

.auth-card{
    align-self:center;
    justify-self:center;
    width:min(520px, calc(100% - 32px));
    padding:34px 30px 26px;
    background:rgba(255,255,255,.92);
    backdrop-filter:blur(18px);
    border:1px solid rgba(255,255,255,.42);
    border-radius:var(--radius-xl);
    box-shadow:
        inset 0 1px 0 rgba(255,255,255,.85),
        var(--shadow-1);
    position:relative;
}
.auth-card::before{
    content:"";
    position:absolute;
    inset:0;
    border-radius:inherit;
    padding:1px;
    background:linear-gradient(135deg, rgba(255,255,255,.8), rgba(125,92,255,.18), rgba(91,124,255,.18));
    -webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);
    -webkit-mask-composite:xor;
            mask-composite:exclude;
    pointer-events:none;
}

.auth-logo{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    padding:10px 14px;
    border-radius:999px;
    background:linear-gradient(135deg, #111a3a, #3149a8);
    color:#fff;
    font-weight:800;
    letter-spacing:.08em;
    font-size:13px;
    box-shadow:0 10px 22px rgba(49,73,168,.28);
}

.auth-card h1{
    margin:18px 0 10px;
    font-size:34px;
    line-height:1.08;
    letter-spacing:-.03em;
}

.auth-sub{
    margin:0 0 20px;
    color:var(--muted);
    line-height:1.7;
    font-size:14px;
}

.alert{
    padding:13px 14px;
    border-radius:14px;
    margin:0 0 14px;
    font-size:14px;
    line-height:1.6;
    border:1px solid transparent;
    box-shadow:var(--shadow-2);
}
.alert--error{background:rgba(239,68,68,.09); color:#991b1b; border-color:rgba(239,68,68,.16)}
.alert--success{background:rgba(22,163,74,.09); color:#166534; border-color:rgba(22,163,74,.16)}
.alert--warning{background:rgba(245,158,11,.10); color:#92400e; border-color:rgba(245,158,11,.18)}

.auth-form{display:grid; gap:12px}
.auth-form label{
    font-size:13px;
    font-weight:700;
    color:#2a3247;
    margin-top:2px;
}
.auth-form input{
    width:100%;
    min-height:52px;
    border:none;
    outline:none;
    border-radius:16px;
    background:#fff;
    padding:0 16px;
    color:var(--text);
    font-size:15px;
    border:1px solid rgba(19,25,44,.10);
    box-shadow:
        inset 0 1px 0 rgba(255,255,255,.8),
        0 8px 22px rgba(16,24,40,.06);
    transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.auth-form input::placeholder{color:#98a0b3}
.auth-form input:focus{
    border-color:rgba(91,124,255,.55);
    box-shadow:
        0 0 0 4px rgba(91,124,255,.12),
        0 14px 28px rgba(37,52,114,.12);
    transform:translateY(-1px);
}

.auth-btn{
    margin-top:6px;
    min-height:54px;
    border:none;
    width:100%;
    border-radius:18px;
    background:linear-gradient(135deg, var(--primary), var(--primary-2));
    color:#fff;
    font-weight:800;
    font-size:15px;
    letter-spacing:.01em;
    cursor:pointer;
    box-shadow:
        0 18px 30px rgba(91,124,255,.26),
        inset 0 1px 0 rgba(255,255,255,.26);
    transition:transform .18s ease, box-shadow .18s ease, filter .18s ease;
}
.auth-btn:hover{
    transform:translateY(-2px);
    box-shadow:0 22px 34px rgba(91,124,255,.34), inset 0 1px 0 rgba(255,255,255,.26);
    filter:saturate(1.05);
}
.auth-btn:active{transform:translateY(0)}

.auth-links{
    display:flex;
    flex-wrap:wrap;
    gap:10px 14px;
    margin-top:18px;
}
.auth-links a{
    color:#3347a6;
    text-decoration:none;
    font-size:14px;
    font-weight:700;
}
.auth-links a:hover{text-decoration:underline}

.auth-demo{
    margin-top:16px;
    padding-top:16px;
    border-top:1px dashed rgba(19,25,44,.10);
    color:var(--muted);
    font-size:13px;
    line-height:1.7;
}
.auth-demo strong{color:#111827}

@media (max-width: 980px){
    .auth-shell{grid-template-columns:1fr}
    .auth-hero{display:none}
    .auth-card{margin:24px 0}
}

@media (max-width: 640px){
    .auth-card{
        width:min(100% - 20px, 520px);
        padding:24px 16px 18px;
        border-radius:22px;
    }
    .auth-card h1{font-size:28px}
    .auth-sub{font-size:13px}
    .auth-form input{min-height:50px;border-radius:14px}
    .auth-btn{min-height:50px;border-radius:16px}
    .auth-links{flex-direction:column;gap:8px}
}