:root {
        --kt-font-family: 'Inter', sans-serif;
        --kt-primary: #CA1F00;
        --kt-primary-active: #fb320e;
        --kt-text-gray-800: #181C32;
        --kt-text-gray-600: #7E8299;
        --kt-text-gray-400: #B5B5C3;
        --kt-body-bg: #F9F9F9;
        /* Fondo muy suave, casi blanco */
        --kt-card-bg: #ffffff;
        --kt-border-color: #eff2f5;
    }

    body {
        font-family: var(--kt-font-family);
        background-color: var(--kt-body-bg);
        color: var(--kt-text-gray-800);
        display: flex;
        flex-direction: column;
        min-height: 100vh;
    }

    /* --- Header --- */
    .header {
        padding: 0.5rem 6rem 0.5rem 2rem;
        display: flex;
        justify-content: space-between;
        align-items: center;
        background: transparent;
        position: absolute;
        width: 100%;
        top: 0;
        z-index: 10;
    }

    .brand-logo {
        font-size: 1.5rem;
        font-weight: 700;
        color: var(--kt-text-gray-800);
        text-decoration: none;
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .header-actions {
        display: flex;
        align-items: center;
        gap: 1.5rem;
    }

    .nav-link-custom {
        color: var(--kt-text-gray-600);
        font-weight: 500;
        font-size: 0.9rem;
        text-decoration: none;
        transition: color 0.2s;
        cursor: pointer;
        display: flex;
        align-items: center;
        gap: 5px;
    }

    .nav-link-custom:hover {
        color: var(--kt-primary);
    }

    .btn-outline-custom {
        border: 1px solid var(--kt-border-color);
        color: var(--kt-text-gray-600);
        border-radius: 8px;
        padding: 0.4rem 0.8rem;
        font-size: 0.85rem;
        background: white;
        transition: all 0.2s;
    }

    .btn-outline-custom:hover {
        border-color: var(--kt-primary);
        color: var(--kt-primary);
    }

    /* --- Main Content --- */
    .main-content {
        flex-grow: 1;
        display: flex;
        justify-content: center;
        align-items: center;
        padding: 2rem;
        margin-top: 60px;
        /* Space for header */
    }

    .login-card {
        background: var(--kt-card-bg);
        width: 100%;
        max-width: 450px;
        min-width: 500px;
        padding: 3rem;
        border-radius: 12px;
        box-shadow: 0px 10px 30px rgba(0, 0, 0, 0.03);
        /* Sombra muy sutil */
        border: 1px solid rgba(0, 0, 0, 0.02);
    }

    .form-title {
        text-align: center;
        font-weight: 700;
        margin-bottom: 0.5rem;
        font-size: 1.5rem;
    }

    .form-subtitle {
        text-align: center;
        color: var(--kt-text-gray-600);
        margin-bottom: 2rem;
        font-size: 0.95rem;
    }

    /* Inputs */
    .form-label {
        font-weight: 600;
        font-size: 0.9rem;
        margin-bottom: 0.4rem;
        color: var(--kt-text-gray-800);
    }

    .form-control {
        background-color: #f5f8fa;
        border: 1px solid transparent;
        padding: 0.8rem 1rem;
        font-size: 1rem;
        border-radius: 8px;
    }

    .form-control:focus {
        background-color: #eef3f7;
        border-color: transparent;
        box-shadow: none;
        color: var(--kt-text-gray-800);
    }

    .btn-primary {
        background-color: var(--kt-primary);
        border-color: var(--kt-primary);
        padding: 0.8rem;
        font-weight: 600;
        border-radius: 8px;
        width: 100%;
        margin-top: 1rem;
    }

    .btn-primary:hover {
        background-color: var(--kt-primary-active);
    }

    /* --- Footer (Simple) --- */
    .simple-footer {
        text-align: center;
        padding: 1.5rem;
        color: var(--kt-text-gray-400);
        font-size: 0.85rem;
    }

    /* Utility */
    .eye-icon {
        position: absolute;
        right: 15px;
        top: 50%;
        transform: translateY(-50%);
        cursor: pointer;
        color: var(--kt-text-gray-400);
    }