* { box-sizing: border-box; }
html, body {
    margin: 0;
    width: 100%;
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
    overflow: hidden;
}

.bg-video, .bg-image {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    background-size: cover;
    background-position: center;
}

.overlay {
    position: fixed;
    inset: 0;
    background: linear-gradient(135deg, rgba(15,23,42,.72), rgba(30,41,59,.65));
    backdrop-filter: blur(3px);
}

.login-card {
    position: relative;
    z-index: 2;
    width: min(420px, calc(100% - 32px));
    margin: 10vh auto;
    padding: 28px;
    border-radius: 24px;
    background: rgba(255,255,255,.1);
    border: 1px solid rgba(255,255,255,.14);
    box-shadow: 0 20px 50px rgba(0,0,0,.25);
    color: #fff;
}

.brand {
    font-size: 14px;
    opacity: .85;
    margin-bottom: 8px;
}

.login-card h1 {
    margin: 0 0 10px;
    font-size: 32px;
}

.login-card p {
    color: rgba(255,255,255,.85);
    margin-bottom: 18px;
}

.form-group {
    margin-bottom: 14px;
}

.form-group label {
    display: block;
    font-size: 13px;
    margin-bottom: 6px;
}

.form-group input {
    width: 100%;
    padding: 13px 14px;
    border-radius: 14px;
    border: 1px solid rgba(255,255,255,.18);
    outline: none;
    background: rgba(255,255,255,.12);
    color: #fff;
}

.form-group input::placeholder { color: rgba(255,255,255,.65); }

.btn-login {
    width: 100%;
    margin-top: 10px;
    padding: 14px;
    border: none;
    border-radius: 14px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    background: #3b82f6;
    color: #fff;
}