:root {
    --alpha-navy: #071b3a;
    --alpha-blue: #006fb9;
    --alpha-blue-light: #e8f3fb;
    --alpha-grey-100: #f5f7fa;
    --alpha-grey-300: #d8dee8;
    --alpha-grey-700: #3f4a5a;
    --alpha-white: #ffffff;
    --alpha-danger: #b42318;
    --alpha-success: #027a48;

    --radius-lg: 18px;
    --shadow-card: 0 24px 60px rgba(7, 27, 58, 0.18);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: Arial, Helvetica, sans-serif;
    background:
        radial-gradient(circle at top left, rgba(0, 111, 185, 0.18), transparent 32%),
        linear-gradient(135deg, #071b3a 0%, #0b2d5a 45%, #f5f7fa 45%, #f5f7fa 100%);
    color: var(--alpha-grey-700);
}

.auth-page {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
}

.auth-brand-panel {
    color: var(--alpha-white);
    padding: 56px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.auth-logo {
    max-width: 220px;
    height: auto;
    background: var(--alpha-white);
    padding: 14px 18px;
    border-radius: 12px;
}

.auth-brand-copy {
    max-width: 560px;
}

.auth-brand-copy h1 {
    font-size: 42px;
    line-height: 1.1;
    margin: 0 0 20px;
}

.auth-brand-copy p {
    font-size: 18px;
    line-height: 1.6;
    margin: 0;
    opacity: 0.92;
}

.auth-mark {
    width: 96px;
    height: auto;
    opacity: 0.18;
    margin-bottom: 24px;
}

.auth-trust-list {
    display: grid;
    gap: 10px;
    margin-top: 28px;
    font-size: 15px;
}

.auth-trust-list span::before {
    content: "\2713";
    margin-right: 10px;
    color: #8fd3ff;
}

.auth-form-panel {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
}

.auth-card {
    width: 100%;
    max-width: 430px;
    background: var(--alpha-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    padding: 36px;
    border: 1px solid rgba(7, 27, 58, 0.08);
}

.auth-card h2 {
    margin: 0 0 8px;
    color: var(--alpha-navy);
    font-size: 28px;
}

.auth-card .subtitle {
    margin: 0 0 28px;
    color: var(--alpha-grey-700);
    font-size: 15px;
}

.auth-field {
    margin-bottom: 18px;
}

.auth-field label {
    display: block;
    margin-bottom: 7px;
    font-weight: 700;
    color: var(--alpha-navy);
    font-size: 14px;
}

.auth-field input {
    width: 100%;
    border: 1px solid var(--alpha-grey-300);
    border-radius: 10px;
    padding: 13px 14px;
    font-size: 15px;
    outline: none;
}

.auth-field input:focus {
    border-color: var(--alpha-blue);
    box-shadow: 0 0 0 4px rgba(0, 111, 185, 0.12);
}

.auth-field input.auth-code-input {
    text-transform: uppercase;
    letter-spacing: 4px;
    font-size: 22px;
    font-weight: 700;
    text-align: center;
}

.auth-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 6px;
}

.auth-check {
    display: flex;
    gap: 8px;
    align-items: center;
    font-size: 14px;
    color: var(--alpha-grey-700);
}

.auth-check input {
    width: 16px;
    height: 16px;
}

.auth-inline-link {
    color: var(--alpha-blue);
    font-size: 14px;
    font-weight: 700;
    text-decoration: none;
}

.auth-inline-link:hover {
    text-decoration: underline;
}

.auth-actions {
    margin-top: 24px;
}

.auth-button {
    width: 100%;
    border: 0;
    border-radius: 10px;
    background: var(--alpha-blue);
    color: var(--alpha-white);
    padding: 14px 18px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
}

.auth-button:hover {
    background: #005c99;
}

.auth-meta {
    margin-top: 18px;
    font-size: 13px;
    color: var(--alpha-grey-700);
    text-align: center;
}

.auth-meta a {
    color: var(--alpha-blue);
    font-weight: 700;
    text-decoration: none;
}

.auth-secondary-actions {
    display: flex;
    justify-content: center;
    gap: 18px;
    margin-top: 18px;
}

.auth-secondary-actions form {
    margin: 0;
}

.auth-link-button {
    border: 0;
    background: transparent;
    color: var(--alpha-blue);
    cursor: pointer;
    font-weight: 700;
    padding: 0;
    font-size: 14px;
}

.auth-link-button:hover {
    text-decoration: underline;
}

.auth-alert {
    padding: 12px 14px;
    border-radius: 10px;
    margin-bottom: 18px;
    font-size: 14px;
}

.auth-alert.error {
    background: #fff1f0;
    color: var(--alpha-danger);
    border: 1px solid #fecdca;
}

.auth-alert.success {
    background: #ecfdf3;
    color: var(--alpha-success);
    border: 1px solid #abefc6;
}

.auth-footer {
    font-size: 13px;
    opacity: 0.8;
}

@media (max-width: 900px) {
    body {
        background:
            radial-gradient(circle at top left, rgba(0, 111, 185, 0.16), transparent 34%),
            var(--alpha-grey-100);
        color: var(--alpha-grey-700);
    }

    .auth-page {
        grid-template-columns: 1fr;
    }

    .auth-brand-panel {
        color: var(--alpha-navy);
        padding: 28px 24px 12px;
        min-height: 0;
        justify-content: start;
        gap: 18px;
    }

    .auth-logo {
        display: none;
    }

    .auth-brand-copy {
        max-width: 560px;
    }

    .auth-brand-copy h1 {
        font-size: 28px;
        line-height: 1.16;
        margin-bottom: 14px;
    }

    .auth-brand-copy p {
        color: var(--alpha-grey-700);
        font-size: 16px;
        line-height: 1.5;
        opacity: 1;
    }

    .auth-trust-list {
        color: var(--alpha-grey-700);
        gap: 8px;
        margin-top: 20px;
        font-size: 14px;
    }

    .auth-trust-list span::before {
        color: var(--alpha-blue);
    }

    .auth-footer {
        display: none;
    }

    .auth-form-panel {
        align-items: start;
        padding: 16px 24px 28px;
    }

    .auth-mark {
        width: 70px;
        opacity: 0.7;
        margin-bottom: 18px;
    }
}

@media (max-width: 520px) {
    .auth-brand-panel {
        padding: 22px 18px 8px;
    }

    .auth-brand-copy h1 {
        font-size: 24px;
    }

    .auth-brand-copy p,
    .auth-trust-list {
        font-size: 13px;
    }

    .auth-form-panel {
        padding: 12px 18px 24px;
    }

    .auth-card {
        padding: 26px 22px;
        border-radius: 14px;
    }
}