* {
            box-sizing: border-box;
        }

        body {
            margin: 0;
            padding: 0;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;

            background: linear-gradient(rgba(0, 15, 35, 0.7), rgba(0, 15, 35, 0.8)),
                url('https://images.unsplash.com/photo-1530533718754-001d2668365a?q=80&w=1170&auto=format&fit=crop&ixlib=rb-4.1.0&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            background-attachment: fixed;
        }

        /* === CONTENEDOR PRINCIPAL === */
        .login-container {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);

            padding: 40px 30px;
            border-radius: 20px;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5);
            width: 90%;
            max-width: 400px;
            text-align: center;

            word-wrap: break-word;
            overflow-wrap: break-word;

            /* Animación de entrada */
            animation: fadeInUp 0.5s ease-out;
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* === SHAKE PARA ERRORES === */
        @keyframes shake {
            0%, 100% { transform: translateX(0); }
            20%, 60% { transform: translateX(-8px); }
            40%, 80% { transform: translateX(8px); }
        }

        .shake {
            animation: shake 0.4s ease-in-out;
        }

        /* === LOGO === */
        .logo-campana {
            width: 130px;
            height: auto;
            margin-bottom: 15px;
            filter: drop-shadow(0px 4px 6px rgba(0, 0, 0, 0.1));
        }

        .login-container h2 {
            margin-top: 0;
            color: #1a2b4c;
            font-size: 22px;
            margin-bottom: 5px;
            letter-spacing: 0.5px;
        }

        .login-container p {
            color: #666;
            font-size: 14px;
            margin-bottom: 25px;
        }

        /* === FORMULARIO === */
        .form-group {
            margin-bottom: 20px;
            text-align: left;
        }

        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 8px;
            color: #333;
            font-size: 14px;
        }

        .form-group input[type="text"],
        .form-group input[type="password"] {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #ccd0d5;
            border-radius: 8px;
            font-size: 16px;
            background-color: #f8f9fa;
            transition: all 0.3s;
        }

        .form-group input[type="text"]:focus,
        .form-group input[type="password"]:focus {
            border-color: #0056b3;
            background-color: #ffffff;
            outline: none;
            box-shadow: 0 0 0 3px rgba(0, 86, 179, 0.15);
        }

        /* === WRAPPER DEL INPUT PIN + OJO === */
        .input-wrapper {
            position: relative;
        }

        .input-wrapper input {
            padding-right: 45px;
        }

        .toggle-pin {
            position: absolute;
            right: 10px;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            cursor: pointer;
            color: #888;
            padding: 5px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: color 0.2s;
        }

        .toggle-pin:hover {
            color: #0056b3;
        }

        /* === CHECKBOX RECORDAR SESIÓN === */
        .remember-group {
            margin-bottom: 20px;
        }

        .checkbox-label {
            display: flex;
            align-items: center;
            gap: 8px;
            cursor: pointer;
            font-weight: normal !important;
            font-size: 14px;
            color: #555;
        }

        .checkbox-label input[type="checkbox"] {
            width: 16px;
            height: 16px;
            accent-color: #0056b3;
            cursor: pointer;
        }

        /* === BOTÓN PRINCIPAL === */
        .btn-login {
            width: 100%;
            background: linear-gradient(135deg, #0056b3 0%, #003d82 100%);
            color: white;
            border: none;
            padding: 14px;
            border-radius: 8px;
            cursor: pointer;
            font-weight: bold;
            font-size: 16px;
            letter-spacing: 1px;
            transition: transform 0.2s, box-shadow 0.2s, opacity 0.2s;
            box-shadow: 0 4px 10px rgba(0, 86, 179, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0;
        }

        .btn-login:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 15px rgba(0, 86, 179, 0.4);
        }

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

        .btn-login:disabled {
            opacity: 0.7;
            cursor: not-allowed;
            transform: none;
        }

        .btn-login.loading {
            pointer-events: none;
        }

        /* === SPINNER === */
        .spinner {
            display: inline-block;
            width: 18px;
            height: 18px;
            border: 2px solid rgba(255, 255, 255, 0.3);
            border-top-color: white;
            border-radius: 50%;
            animation: spin 0.6s linear infinite;
            margin-right: 8px;
            flex-shrink: 0;
        }

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