:root {
    --admin-bg: #f5f7fb;
    --admin-surface: #ffffff;
    --admin-border: #e8edf4;
    --admin-text: #0f172a;
    --admin-muted: #667792;
    --admin-primary: #C71456;
    --admin-primary-hover: #a80f46;
    --admin-danger: #ff4d4f;
    --admin-shadow: 0 2px 8px rgba(15, 23, 42, 0.04);
    --admin-radius-xl: 24px;
    --admin-radius-lg: 20px;
    --admin-radius-md: 16px;
}

html, body {
    height: 100%;
}

.admin-auth-body {
    margin: 0;
    font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
    background: radial-gradient(circle at top left, rgba(199, 20, 86, 0.08), transparent 30%), radial-gradient(circle at bottom right, rgba(199, 20, 86, 0.05), transparent 35%), var(--admin-bg);
    color: var(--admin-text);
}

.admin-auth-shell {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.admin-auth-card {
    width: 100%;
    max-width: 520px;
    background: var(--admin-surface);
    border: 1px solid var(--admin-border);
    border-radius: var(--admin-radius-xl);
    box-shadow: var(--admin-shadow);
    padding: 2rem;
}

.admin-auth-brand {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.admin-auth-brand-icon {
    width: 56px;
    height: 56px;
    border-radius: 18px;
    background: rgba(199, 20, 86, 0.08);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    overflow: hidden;
}

    .admin-auth-brand-icon img {
        width: 100%;
        height: 100%;
        object-fit: contain;
    }

.admin-auth-brand-title {
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.admin-auth-brand-subtitle {
    color: var(--admin-muted);
    font-size: 0.95rem;
}

.admin-auth-header {
    margin-bottom: 1.5rem;
}

.admin-auth-title {
    margin: 0 0 0.35rem;
    font-size: 2rem;
    line-height: 1.05;
    font-weight: 800;
    letter-spacing: -0.03em;
}

.admin-auth-text {
    margin: 0;
    color: var(--admin-muted);
    font-size: 1rem;
}

.admin-auth-form .form-label {
    font-weight: 600;
    color: var(--admin-text);
}

.admin-input {
    min-height: 52px;
    border-radius: var(--admin-radius-md);
    border: 1px solid var(--admin-border);
    background: #fff;
    padding-left: 0.95rem;
    padding-right: 0.95rem;
    font-size: 1rem;
}

    .admin-input:focus {
        border-color: #d88aa8;
        box-shadow: 0 0 0 0.2rem rgba(199, 20, 86, 0.10);
    }

.admin-btn-primary {
    min-height: 52px;
    border-radius: var(--admin-radius-md);
    background: var(--admin-primary);
    border: 1px solid var(--admin-primary);
    color: #fff;
    font-weight: 700;
    font-size: 1rem;
    box-shadow: 0 8px 20px rgba(199, 20, 86, 0.20);
}

    .admin-btn-primary:hover,
    .admin-btn-primary:focus {
        background: var(--admin-primary-hover);
        border-color: var(--admin-primary-hover);
        color: #fff;
    }

.admin-auth-links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    text-align: center;
}

    .admin-auth-links a {
        color: var(--admin-primary);
        text-decoration: none;
        font-weight: 600;
    }

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

.admin-auth-check {
    display: flex;
    align-items: center;
}

    .admin-auth-check .form-check-input:checked {
        background-color: var(--admin-primary);
        border-color: var(--admin-primary);
    }

    .admin-auth-check .form-check-input:focus {
        box-shadow: 0 0 0 0.2rem rgba(199, 20, 86, 0.10);
        border-color: #d88aa8;
    }

.text-danger,
.validation-summary-errors,
.field-validation-error {
    color: var(--admin-danger) !important;
}

@media (max-width: 575.98px) {
    .admin-auth-shell {
        padding: 1rem;
    }

    .admin-auth-card {
        padding: 1.35rem;
        border-radius: 20px;
    }

    .admin-auth-title {
        font-size: 1.7rem;
    }
}