* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
            background: linear-gradient(135deg, var(--titlecolor) 0%, color-mix(in srgb, var(--titlecolor) 85%, black) 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .login-container {
            width: 100%;
            max-width: 420px;
            padding: 20px;
        }

        .login-card {
            background: white;
            border-radius: 12px;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
            padding: 40px 30px;
            animation: slideUp 0.5s ease-out;
        }

        @keyframes slideUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .logo-section {
            text-align: center;
            margin-bottom: 40px;
        }

        .logo-section img {
            max-width: 180px;
            height: auto;
            display: inline-block;
        }

        .logo-brand {
            font-size: 18px;
            font-weight: 700;
            color: #333;
            margin-top: 15px;
            letter-spacing: 0.5px;
        }

        .welcome-text {
            text-align: center;
            color: #666;
            font-size: 14px;
            margin-bottom: 30px;
        }

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

        .form-group label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: #333;
            margin-bottom: 8px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .form-group input {
            width: 100%;
            padding: 12px 15px;
            border: 2px solid #e0e0e0;
            border-radius: 8px;
            font-size: 14px;
            transition: all 0.3s ease;
            background: #fafafa;
        }

        .form-group input:focus {
            outline: none;
            border-color: var(--titlecolor);
            background: white;
            box-shadow: 0 0 0 3px color-mix(in srgb, var(--titlecolor) 10%, transparent);
        }

        .form-group input::placeholder {
            color: #999;
        }

        .error-message {
            color: #e74c3c;
            font-size: 13px;
            margin-top: 8px;
            min-height: 18px;
            text-align: center;
        }

        .login-button {
            width: 100%;
            padding: 13px 20px;
            background: linear-gradient(135deg, var(--titlecolor) 0%, color-mix(in srgb, var(--titlecolor) 85%, black) 100%);
            color: white;
            border: none;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            cursor: pointer;
            transition: all 0.3s ease;
            margin-top: 10px;
        }

        .login-button:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 20px color-mix(in srgb, var(--titlecolor) 40%, transparent);
        }

        .login-button:active {
            transform: translateY(0);
        }

        .footer-text {
            text-align: center;
            font-size: 11px;
            color: #999;
            margin-top: 20px;
        }

        .footer-text a {
            color: var(--titlecolor);
            text-decoration: none;
            transition: color 0.3s ease;
        }

        .footer-text a:hover {
            color: color-mix(in srgb, var(--titlecolor) 85%, black);
            text-decoration: underline;
        }

        .preloader {
            display: none !important;
        }

        .login-button:disabled {
            opacity: 0.75;
            cursor: not-allowed;
            transform: none;
        }

        .btn-spinner {
            display: inline-block;
            width: 14px;
            height: 14px;
            border: 2px solid rgba(255,255,255,0.4);
            border-top-color: #fff;
            border-radius: 50%;
            animation: spin 0.7s linear infinite;
            vertical-align: middle;
            margin-right: 8px;
        }

        @keyframes spin {
            to { transform: rotate(360deg); }
        }

        /* Responsivo */
        @media (max-width: 480px) {
            .login-card {
                padding: 30px 20px;
            }

            .logo-section {
                margin-bottom: 30px;
            }

            .logo-section img {
                max-width: 150px;
            }

            .logo-brand {
                font-size: 16px;
            }

            .form-group input {
                padding: 11px 12px;
                font-size: 16px; /* Evita zoom no iOS */
            }

            .login-button {
                padding: 12px 15px;
                font-size: 13px;
            }
        }