:root {
            --navy-deep: #0a2647;
            --navy-bright: #144272;
            --soft-bg: #f0f4f8;
            --white: #ffffff;
        }

        body {
            background-color: var(--soft-bg);
            font-family: 'Inter', sans-serif;
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: 100vh;
            margin: 0;
        }

        .login-container {
            width: 100%;
            max-width: 400px;
            padding: 20px;
        }

        .auth-card {
            background: var(--white);
            padding: 40px 30px;
            border-radius: 30px;
            box-shadow: 0 20px 40px rgba(10, 38, 71, 0.1);
            border: none;
        }

        .brand-icon {
            width: 60px;
            height: 60px;
            background: var(--navy-deep);
            color: var(--white);
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 18px;
            margin: 0 auto 20px;
            font-size: 1.8rem;
        }

        .form-label {
            color: var(--navy-deep);
            font-weight: 600;
            font-size: 0.85rem;
            margin-left: 5px;
        }

        .form-control {
            border: 2px solid #e1e8ef;
            border-radius: 15px;
            padding: 12px 18px;
            background-color: #fafbfc;
            transition: all 0.3s ease;
        }

        .form-control:focus {
            border-color: var(--navy-bright);
            box-shadow: none;
            background-color: var(--white);
        }

        /* BOTÓN PRINCIPAL: Texto Blanco Garantizado */
        .btn-navy {
            background-color: var(--navy-deep);
            color: var(--white) !important;
            border: none;
            border-radius: 15px;
            padding: 14px;
            font-weight: 600;
            width: 100%;
            margin-top: 10px;
            transition: all 0.3s ease;
        }

        .btn-navy:hover {
            background-color: var(--navy-bright);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(10, 38, 71, 0.2);
        }

        .auth-switch {
            text-align: center;
            margin-top: 25px;
            font-size: 0.9rem;
        }

        .auth-switch a {
            color: var(--navy-bright);
            text-decoration: none;
            font-weight: 700;
        }

        /* Clases para alternar formularios */
        .d-none { display: none !important; }