:root{
    --primary:#2563eb;
    --primary-dark:#1d4ed8;
    --bg:#f5f7fa;
    --text:#1f2937;
    --muted:#6b7280;
    --border:#e5e7eb;
}

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

body{
    font-family:Arial, Helvetica, sans-serif;
    background:var(--bg);
    color:var(--text);
}

.login-page{
    min-height:100vh;
    display:flex;
    align-items:center;
    justify-content:center;
    background:
        radial-gradient(circle at top left, rgba(37,99,235,.18), transparent 35%),
        linear-gradient(135deg,#f8fafc,#eef2ff);
    padding:20px;
}

.login-card{
    width:100%;
    max-width:430px;
    background:#fff;
    border-radius:22px;
    padding:42px;
    box-shadow:0 24px 60px rgba(15,23,42,.14);
    border:1px solid rgba(255,255,255,.8);
}

.login-logo{
    width:74px;
    height:74px;
    background:var(--primary);
    color:#fff;
    border-radius:20px;
    display:flex;
    align-items:center;
    justify-content:center;
    font-size:30px;
    font-weight:800;
    margin:0 auto 18px;
    box-shadow:0 12px 28px rgba(37,99,235,.35);
}

.login-title{
    text-align:center;
    font-size:32px;
    font-weight:800;
    color:var(--text);
    margin-bottom:6px;
}

.login-subtitle{
    text-align:center;
    color:var(--muted);
    margin-bottom:30px;
}

.form-group{
    margin-bottom:18px;
}

.form-label{
    display:block;
    font-weight:700;
    margin-bottom:8px;
    color:#374151;
}

.form-control{
    width:100%;
    height:52px;
    border:1px solid var(--border);
    border-radius:14px;
    padding:0 15px;
    font-size:16px;
    background:#f9fafb;
    transition:.2s;
}

.form-control:focus{
    outline:none;
    border-color:var(--primary);
    background:#fff;
    box-shadow:0 0 0 4px rgba(37,99,235,.12);
}

.login-button{
    width:100%;
    height:52px;
    border:none;
    border-radius:14px;
    background:var(--primary);
    color:#fff;
    font-size:16px;
    font-weight:800;
    cursor:pointer;
    transition:.2s;
    margin-top:6px;
}

.login-button:hover{
    background:var(--primary-dark);
    transform:translateY(-1px);
}

.login-error{
    background:#fee2e2;
    color:#991b1b;
    border:1px solid #fecaca;
    padding:12px 14px;
    border-radius:12px;
    margin-bottom:18px;
    font-weight:600;
    font-size:14px;
}

.login-footer{
    margin-top:24px;
    text-align:center;
    color:var(--muted);
    font-size:13px;
}