:root {
    --zeus-navy: #062563;
    --zeus-dark: #030b18;
    --zeus-blue: #087cff;
    --zeus-cyan: #09bff1;
    --text: #132238;
    --muted: #718096;
    --border: #dce5ef;
    --danger: #b42318;
    --danger-bg: #fef3f2;
    --success: #067647;
    --success-bg: #ecfdf3;
}

* {
    box-sizing: border-box;
}

html,
body {
    min-height: 100%;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, Helvetica, sans-serif;
    background:
        radial-gradient(circle at 20% 10%, rgba(9, 191, 241, .18), transparent 28%),
        radial-gradient(circle at 85% 85%, rgba(8, 124, 255, .18), transparent 30%),
        linear-gradient(145deg, #020711, #07172f);
    color: var(--text);
}

.auth-shell {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 32px 18px;
}

.auth-card {
    width: 100%;
    max-width: 540px;
    background: rgba(255, 255, 255, .98);
    border-radius: 22px;
    overflow: hidden;
    box-shadow:
        0 30px 80px rgba(0, 0, 0, .45),
        0 0 0 1px rgba(255, 255, 255, .08);
}

.zeus-header {
    padding: 28px 34px 18px;
    text-align: center;
    background: linear-gradient(180deg, #ffffff, #f7fbff);
}

.zeus-logo-container {
    display: flex;
    justify-content: center;
}

.zeus-logo {
    width: 100%;
    max-width: 390px;
    max-height: 130px;
    object-fit: contain;
}

.zeus-platform {
    margin-top: 8px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
    color: #597089;
}

.auth-content {
    padding: 25px 46px 35px;
}

.auth-heading {
    text-align: center;
    margin-bottom: 28px;
}

.auth-heading h1 {
    margin: 0 0 8px;
    font-size: 26px;
    color: var(--zeus-navy);
}

.auth-heading p {
    margin: 0;
    font-size: 14px;
    color: var(--muted);
}

.auth-form {
    width: 100%;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 7px;
    font-size: 13px;
    font-weight: 700;
    color: #344054;
}

.form-group input {
    width: 100%;
    min-height: 48px;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: #ffffff;
    color: var(--text);
    font-size: 15px;
    outline: none;
    transition: border-color .15s ease, box-shadow .15s ease;
}

.form-group input:focus {
    border-color: var(--zeus-cyan);
    box-shadow: 0 0 0 4px rgba(9, 191, 241, .12);
}

.auth-button {
    width: 100%;
    display: block;
    margin-top: 8px;
    border: 0;
    border-radius: 8px;
    padding: 15px 18px;
    cursor: pointer;
    background: linear-gradient(90deg, var(--zeus-blue), var(--zeus-cyan));
    color: #ffffff;
    font-size: 14px;
    font-weight: 800;
    letter-spacing: .6px;
    text-align: center;
    text-decoration: none;
    transition: transform .12s ease, box-shadow .12s ease;
}

.auth-button:hover {
    transform: translateY(-1px);
    box-shadow: 0 10px 24px rgba(8, 124, 255, .25);
}

.auth-button-link {
    text-decoration: none;
}

.auth-links {
    margin-top: 22px;
    text-align: center;
}

.auth-links a {
    color: #0875d1;
    font-size: 13px;
    text-decoration: none;
}

.auth-links a:hover {
    text-decoration: underline;
}

.auth-alert {
    margin-bottom: 22px;
    padding: 13px 15px;
    border-radius: 8px;
    font-size: 13px;
    line-height: 1.5;
}

.auth-alert-error {
    color: var(--danger);
    background: var(--danger-bg);
}

.auth-alert-success {
    color: var(--success);
    background: var(--success-bg);
}

.field-error,
.errorlist {
    margin: 6px 0 0;
    padding: 0;
    list-style: none;
    color: var(--danger);
    font-size: 12px;
}

.corporate-footer {
    padding: 20px 30px 22px;
    border-top: 1px solid #e6edf5;
    background: #f8fafc;
}

.corporate-brands {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}

.brand-box {
    height: 78px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    overflow: hidden;
}

.brand-box img {
    width: 100%;
    height: 100%;
    padding: 7px 12px;
    object-fit: contain;
}

.brand-box.enterprise {
    background: #ffffff;
    border: 1px solid #e0e5ec;
}

.brand-box.energy {
    background: #000000;
}

.zeus-copyright {
    margin-top: 18px;
    text-align: center;
    font-size: 11px;
    color: #8793a3;
}

@media (max-width: 600px) {
    .auth-shell {
        padding: 15px;
    }

    .auth-content {
        padding: 24px 24px 30px;
    }

    .zeus-header {
        padding: 22px 20px 15px;
    }

    .corporate-brands {
        grid-template-columns: 1fr;
    }

    .brand-box {
        height: 72px;
    }
}